forked from Minki/linux
docs/mm: vmalloc: re-indent kernel-doc comemnts
Some kernel-doc comments in mm/vmalloc.c have leading tab in indentation. This leads to excessive indentation in the generated HTML and to the inconsistency of its layout ([1] vs [2]). Besides, multi-line Note: sections are not handled properly with extra indentation. [1] https://www.kernel.org/doc/html/v4.20/core-api/mm-api.html?#c.vm_map_ram [2] https://www.kernel.org/doc/html/v4.20/core-api/mm-api.html?#c.vfree Link: http://lkml.kernel.org/r/1549549644-4903-2-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport
Linus Torvalds
parent
6d2bef9df7
commit
92eac16819
345
mm/vmalloc.c
345
mm/vmalloc.c
@ -1191,6 +1191,7 @@ void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t pro
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EXPORT_SYMBOL(vm_map_ram);
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static struct vm_struct *vmlist __initdata;
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/**
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* vm_area_add_early - add vmap area early during boot
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* @vm: vm_struct to add
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@ -1425,13 +1426,13 @@ struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
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}
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/**
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* get_vm_area - reserve a contiguous kernel virtual area
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* @size: size of the area
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* @flags: %VM_IOREMAP for I/O mappings or VM_ALLOC
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* get_vm_area - reserve a contiguous kernel virtual area
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* @size: size of the area
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* @flags: %VM_IOREMAP for I/O mappings or VM_ALLOC
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*
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* Search an area of @size in the kernel virtual mapping area,
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* and reserved it for out purposes. Returns the area descriptor
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* on success or %NULL on failure.
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* Search an area of @size in the kernel virtual mapping area,
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* and reserved it for out purposes. Returns the area descriptor
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* on success or %NULL on failure.
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*/
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struct vm_struct *get_vm_area(unsigned long size, unsigned long flags)
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{
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@ -1448,12 +1449,12 @@ struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
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}
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/**
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* find_vm_area - find a continuous kernel virtual area
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* @addr: base address
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* find_vm_area - find a continuous kernel virtual area
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* @addr: base address
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*
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* Search for the kernel VM area starting at @addr, and return it.
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* It is up to the caller to do all required locking to keep the returned
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* pointer valid.
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* Search for the kernel VM area starting at @addr, and return it.
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* It is up to the caller to do all required locking to keep the returned
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* pointer valid.
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*/
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struct vm_struct *find_vm_area(const void *addr)
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{
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@ -1467,12 +1468,12 @@ struct vm_struct *find_vm_area(const void *addr)
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}
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/**
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* remove_vm_area - find and remove a continuous kernel virtual area
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* @addr: base address
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* remove_vm_area - find and remove a continuous kernel virtual area
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* @addr: base address
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*
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* Search for the kernel VM area starting at @addr, and remove it.
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* This function returns the found VM area, but using it is NOT safe
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* on SMP machines, except for its size or flags.
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* Search for the kernel VM area starting at @addr, and remove it.
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* This function returns the found VM area, but using it is NOT safe
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* on SMP machines, except for its size or flags.
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*/
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struct vm_struct *remove_vm_area(const void *addr)
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{
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@ -1552,11 +1553,11 @@ static inline void __vfree_deferred(const void *addr)
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}
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/**
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* vfree_atomic - release memory allocated by vmalloc()
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* @addr: memory base address
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* vfree_atomic - release memory allocated by vmalloc()
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* @addr: memory base address
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*
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* This one is just like vfree() but can be called in any atomic context
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* except NMIs.
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* This one is just like vfree() but can be called in any atomic context
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* except NMIs.
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*/
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void vfree_atomic(const void *addr)
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{
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@ -1578,20 +1579,20 @@ static void __vfree(const void *addr)
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}
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/**
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* vfree - release memory allocated by vmalloc()
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* @addr: memory base address
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* vfree - release memory allocated by vmalloc()
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* @addr: memory base address
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*
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* Free the virtually continuous memory area starting at @addr, as
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* obtained from vmalloc(), vmalloc_32() or __vmalloc(). If @addr is
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* NULL, no operation is performed.
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* Free the virtually continuous memory area starting at @addr, as
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* obtained from vmalloc(), vmalloc_32() or __vmalloc(). If @addr is
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* NULL, no operation is performed.
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*
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* Must not be called in NMI context (strictly speaking, only if we don't
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* have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling
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* conventions for vfree() arch-depenedent would be a really bad idea)
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* Must not be called in NMI context (strictly speaking, only if we don't
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* have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling
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* conventions for vfree() arch-depenedent would be a really bad idea)
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*
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* May sleep if called *not* from interrupt context.
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* May sleep if called *not* from interrupt context.
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*
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* NOTE: assumes that the object at @addr has a size >= sizeof(llist_node)
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* NOTE: assumes that the object at @addr has a size >= sizeof(llist_node)
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*/
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void vfree(const void *addr)
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{
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@ -1609,13 +1610,13 @@ void vfree(const void *addr)
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EXPORT_SYMBOL(vfree);
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/**
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* vunmap - release virtual mapping obtained by vmap()
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* @addr: memory base address
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* vunmap - release virtual mapping obtained by vmap()
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* @addr: memory base address
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*
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* Free the virtually contiguous memory area starting at @addr,
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* which was created from the page array passed to vmap().
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* Free the virtually contiguous memory area starting at @addr,
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* which was created from the page array passed to vmap().
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*
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* Must not be called in interrupt context.
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* Must not be called in interrupt context.
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*/
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void vunmap(const void *addr)
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{
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@ -1627,17 +1628,17 @@ void vunmap(const void *addr)
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EXPORT_SYMBOL(vunmap);
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/**
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* vmap - map an array of pages into virtually contiguous space
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* @pages: array of page pointers
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* @count: number of pages to map
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* @flags: vm_area->flags
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* @prot: page protection for the mapping
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* vmap - map an array of pages into virtually contiguous space
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* @pages: array of page pointers
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* @count: number of pages to map
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* @flags: vm_area->flags
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* @prot: page protection for the mapping
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*
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* Maps @count pages from @pages into contiguous kernel virtual
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* space.
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* Maps @count pages from @pages into contiguous kernel virtual
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* space.
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*/
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void *vmap(struct page **pages, unsigned int count,
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unsigned long flags, pgprot_t prot)
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unsigned long flags, pgprot_t prot)
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{
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struct vm_struct *area;
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unsigned long size; /* In bytes */
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@ -1724,20 +1725,20 @@ fail:
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}
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/**
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* __vmalloc_node_range - allocate virtually contiguous memory
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* @size: allocation size
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* @align: desired alignment
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* @start: vm area range start
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* @end: vm area range end
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* @gfp_mask: flags for the page level allocator
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* @prot: protection mask for the allocated pages
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* @vm_flags: additional vm area flags (e.g. %VM_NO_GUARD)
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* @node: node to use for allocation or NUMA_NO_NODE
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* @caller: caller's return address
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* __vmalloc_node_range - allocate virtually contiguous memory
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* @size: allocation size
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* @align: desired alignment
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* @start: vm area range start
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* @end: vm area range end
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* @gfp_mask: flags for the page level allocator
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* @prot: protection mask for the allocated pages
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* @vm_flags: additional vm area flags (e.g. %VM_NO_GUARD)
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* @node: node to use for allocation or NUMA_NO_NODE
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* @caller: caller's return address
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*
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* Allocate enough pages to cover @size from the page level
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* allocator with @gfp_mask flags. Map them into contiguous
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* kernel virtual space, using a pagetable protection of @prot.
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* Allocate enough pages to cover @size from the page level
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* allocator with @gfp_mask flags. Map them into contiguous
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* kernel virtual space, using a pagetable protection of @prot.
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*/
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void *__vmalloc_node_range(unsigned long size, unsigned long align,
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unsigned long start, unsigned long end, gfp_t gfp_mask,
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@ -1788,24 +1789,23 @@ EXPORT_SYMBOL_GPL(__vmalloc_node_range);
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#endif
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/**
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* __vmalloc_node - allocate virtually contiguous memory
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* @size: allocation size
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* @align: desired alignment
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* @gfp_mask: flags for the page level allocator
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* @prot: protection mask for the allocated pages
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* @node: node to use for allocation or NUMA_NO_NODE
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* @caller: caller's return address
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* __vmalloc_node - allocate virtually contiguous memory
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* @size: allocation size
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* @align: desired alignment
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* @gfp_mask: flags for the page level allocator
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* @prot: protection mask for the allocated pages
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* @node: node to use for allocation or NUMA_NO_NODE
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* @caller: caller's return address
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*
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* Allocate enough pages to cover @size from the page level
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* allocator with @gfp_mask flags. Map them into contiguous
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* kernel virtual space, using a pagetable protection of @prot.
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* Allocate enough pages to cover @size from the page level
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* allocator with @gfp_mask flags. Map them into contiguous
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* kernel virtual space, using a pagetable protection of @prot.
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*
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* Reclaim modifiers in @gfp_mask - __GFP_NORETRY, __GFP_RETRY_MAYFAIL
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* and __GFP_NOFAIL are not supported
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*
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* Any use of gfp flags outside of GFP_KERNEL should be consulted
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* with mm people.
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* Reclaim modifiers in @gfp_mask - __GFP_NORETRY, __GFP_RETRY_MAYFAIL
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* and __GFP_NOFAIL are not supported
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*
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* Any use of gfp flags outside of GFP_KERNEL should be consulted
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* with mm people.
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*/
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static void *__vmalloc_node(unsigned long size, unsigned long align,
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gfp_t gfp_mask, pgprot_t prot,
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@ -1837,13 +1837,14 @@ void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
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}
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/**
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* vmalloc - allocate virtually contiguous memory
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* @size: allocation size
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* Allocate enough pages to cover @size from the page level
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* allocator and map them into contiguous kernel virtual space.
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* vmalloc - allocate virtually contiguous memory
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* @size: allocation size
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*
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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* Allocate enough pages to cover @size from the page level
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* allocator and map them into contiguous kernel virtual space.
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*
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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*/
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void *vmalloc(unsigned long size)
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{
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@ -1853,14 +1854,15 @@ void *vmalloc(unsigned long size)
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EXPORT_SYMBOL(vmalloc);
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/**
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* vzalloc - allocate virtually contiguous memory with zero fill
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* @size: allocation size
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* Allocate enough pages to cover @size from the page level
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* allocator and map them into contiguous kernel virtual space.
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* The memory allocated is set to zero.
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* vzalloc - allocate virtually contiguous memory with zero fill
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* @size: allocation size
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*
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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* Allocate enough pages to cover @size from the page level
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* allocator and map them into contiguous kernel virtual space.
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* The memory allocated is set to zero.
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*
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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*/
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void *vzalloc(unsigned long size)
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{
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@ -1886,15 +1888,15 @@ void *vmalloc_user(unsigned long size)
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EXPORT_SYMBOL(vmalloc_user);
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/**
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* vmalloc_node - allocate memory on a specific node
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* @size: allocation size
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* @node: numa node
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* vmalloc_node - allocate memory on a specific node
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* @size: allocation size
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* @node: numa node
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*
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* Allocate enough pages to cover @size from the page level
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* allocator and map them into contiguous kernel virtual space.
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* Allocate enough pages to cover @size from the page level
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* allocator and map them into contiguous kernel virtual space.
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*
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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*/
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void *vmalloc_node(unsigned long size, int node)
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{
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@ -1923,17 +1925,16 @@ void *vzalloc_node(unsigned long size, int node)
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EXPORT_SYMBOL(vzalloc_node);
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/**
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* vmalloc_exec - allocate virtually contiguous, executable memory
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* @size: allocation size
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* vmalloc_exec - allocate virtually contiguous, executable memory
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* @size: allocation size
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*
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* Kernel-internal function to allocate enough pages to cover @size
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* the page level allocator and map them into contiguous and
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* executable kernel virtual space.
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* Kernel-internal function to allocate enough pages to cover @size
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* the page level allocator and map them into contiguous and
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* executable kernel virtual space.
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*
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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* For tight control over page level allocator and protection flags
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* use __vmalloc() instead.
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*/
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void *vmalloc_exec(unsigned long size)
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{
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return __vmalloc_node(size, 1, GFP_KERNEL, PAGE_KERNEL_EXEC,
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@ -1953,11 +1954,11 @@ void *vmalloc_exec(unsigned long size)
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#endif
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/**
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* vmalloc_32 - allocate virtually contiguous memory (32bit addressable)
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* @size: allocation size
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* vmalloc_32 - allocate virtually contiguous memory (32bit addressable)
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* @size: allocation size
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*
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* Allocate enough 32bit PA addressable pages to cover @size from the
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* page level allocator and map them into contiguous kernel virtual space.
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* Allocate enough 32bit PA addressable pages to cover @size from the
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* page level allocator and map them into contiguous kernel virtual space.
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*/
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void *vmalloc_32(unsigned long size)
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{
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@ -1968,7 +1969,7 @@ EXPORT_SYMBOL(vmalloc_32);
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/**
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* vmalloc_32_user - allocate zeroed virtually contiguous 32bit memory
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* @size: allocation size
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* @size: allocation size
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*
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* The resulting memory area is 32bit addressable and zeroed so it can be
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* mapped to userspace without leaking data.
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@ -2064,31 +2065,29 @@ static int aligned_vwrite(char *buf, char *addr, unsigned long count)
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}
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/**
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* vread() - read vmalloc area in a safe way.
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* @buf: buffer for reading data
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* @addr: vm address.
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* @count: number of bytes to be read.
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* vread() - read vmalloc area in a safe way.
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* @buf: buffer for reading data
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* @addr: vm address.
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* @count: number of bytes to be read.
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*
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* Returns # of bytes which addr and buf should be increased.
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* (same number to @count). Returns 0 if [addr...addr+count) doesn't
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* includes any intersect with alive vmalloc area.
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* Returns # of bytes which addr and buf should be increased.
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* (same number to @count). Returns 0 if [addr...addr+count) doesn't
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* includes any intersect with alive vmalloc area.
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*
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* This function checks that addr is a valid vmalloc'ed area, and
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* copy data from that area to a given buffer. If the given memory range
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* of [addr...addr+count) includes some valid address, data is copied to
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* proper area of @buf. If there are memory holes, they'll be zero-filled.
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* IOREMAP area is treated as memory hole and no copy is done.
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* This function checks that addr is a valid vmalloc'ed area, and
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* copy data from that area to a given buffer. If the given memory range
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* of [addr...addr+count) includes some valid address, data is copied to
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* proper area of @buf. If there are memory holes, they'll be zero-filled.
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* IOREMAP area is treated as memory hole and no copy is done.
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*
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* If [addr...addr+count) doesn't includes any intersects with alive
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* vm_struct area, returns 0. @buf should be kernel's buffer.
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*
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* Note: In usual ops, vread() is never necessary because the caller
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* should know vmalloc() area is valid and can use memcpy().
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* This is for routines which have to access vmalloc area without
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* any informaion, as /dev/kmem.
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* If [addr...addr+count) doesn't includes any intersects with alive
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* vm_struct area, returns 0. @buf should be kernel's buffer.
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*
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* Note: In usual ops, vread() is never necessary because the caller
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* should know vmalloc() area is valid and can use memcpy().
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* This is for routines which have to access vmalloc area without
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* any informaion, as /dev/kmem.
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*/
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long vread(char *buf, char *addr, unsigned long count)
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{
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struct vmap_area *va;
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@ -2145,31 +2144,30 @@ finished:
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}
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/**
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* vwrite() - write vmalloc area in a safe way.
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* @buf: buffer for source data
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* @addr: vm address.
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* @count: number of bytes to be read.
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* vwrite() - write vmalloc area in a safe way.
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* @buf: buffer for source data
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* @addr: vm address.
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* @count: number of bytes to be read.
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*
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* Returns # of bytes which addr and buf should be incresed.
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* (same number to @count).
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* If [addr...addr+count) doesn't includes any intersect with valid
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* vmalloc area, returns 0.
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* Returns # of bytes which addr and buf should be incresed.
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* (same number to @count).
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* If [addr...addr+count) doesn't includes any intersect with valid
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* vmalloc area, returns 0.
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*
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* This function checks that addr is a valid vmalloc'ed area, and
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* copy data from a buffer to the given addr. If specified range of
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* [addr...addr+count) includes some valid address, data is copied from
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||||
* proper area of @buf. If there are memory holes, no copy to hole.
|
||||
* IOREMAP area is treated as memory hole and no copy is done.
|
||||
* This function checks that addr is a valid vmalloc'ed area, and
|
||||
* copy data from a buffer to the given addr. If specified range of
|
||||
* [addr...addr+count) includes some valid address, data is copied from
|
||||
* proper area of @buf. If there are memory holes, no copy to hole.
|
||||
* IOREMAP area is treated as memory hole and no copy is done.
|
||||
*
|
||||
* If [addr...addr+count) doesn't includes any intersects with alive
|
||||
* vm_struct area, returns 0. @buf should be kernel's buffer.
|
||||
* If [addr...addr+count) doesn't includes any intersects with alive
|
||||
* vm_struct area, returns 0. @buf should be kernel's buffer.
|
||||
*
|
||||
* Note: In usual ops, vwrite() is never necessary because the caller
|
||||
* should know vmalloc() area is valid and can use memcpy().
|
||||
* This is for routines which have to access vmalloc area without
|
||||
* any informaion, as /dev/kmem.
|
||||
* Note: In usual ops, vwrite() is never necessary because the caller
|
||||
* should know vmalloc() area is valid and can use memcpy().
|
||||
* This is for routines which have to access vmalloc area without
|
||||
* any informaion, as /dev/kmem.
|
||||
*/
|
||||
|
||||
long vwrite(char *buf, char *addr, unsigned long count)
|
||||
{
|
||||
struct vmap_area *va;
|
||||
@ -2221,20 +2219,20 @@ finished:
|
||||
}
|
||||
|
||||
/**
|
||||
* remap_vmalloc_range_partial - map vmalloc pages to userspace
|
||||
* @vma: vma to cover
|
||||
* @uaddr: target user address to start at
|
||||
* @kaddr: virtual address of vmalloc kernel memory
|
||||
* @size: size of map area
|
||||
* remap_vmalloc_range_partial - map vmalloc pages to userspace
|
||||
* @vma: vma to cover
|
||||
* @uaddr: target user address to start at
|
||||
* @kaddr: virtual address of vmalloc kernel memory
|
||||
* @size: size of map area
|
||||
*
|
||||
* Returns: 0 for success, -Exxx on failure
|
||||
* Returns: 0 for success, -Exxx on failure
|
||||
*
|
||||
* This function checks that @kaddr is a valid vmalloc'ed area,
|
||||
* and that it is big enough to cover the range starting at
|
||||
* @uaddr in @vma. Will return failure if that criteria isn't
|
||||
* met.
|
||||
* This function checks that @kaddr is a valid vmalloc'ed area,
|
||||
* and that it is big enough to cover the range starting at
|
||||
* @uaddr in @vma. Will return failure if that criteria isn't
|
||||
* met.
|
||||
*
|
||||
* Similar to remap_pfn_range() (see mm/memory.c)
|
||||
* Similar to remap_pfn_range() (see mm/memory.c)
|
||||
*/
|
||||
int remap_vmalloc_range_partial(struct vm_area_struct *vma, unsigned long uaddr,
|
||||
void *kaddr, unsigned long size)
|
||||
@ -2276,18 +2274,18 @@ int remap_vmalloc_range_partial(struct vm_area_struct *vma, unsigned long uaddr,
|
||||
EXPORT_SYMBOL(remap_vmalloc_range_partial);
|
||||
|
||||
/**
|
||||
* remap_vmalloc_range - map vmalloc pages to userspace
|
||||
* @vma: vma to cover (map full range of vma)
|
||||
* @addr: vmalloc memory
|
||||
* @pgoff: number of pages into addr before first page to map
|
||||
* remap_vmalloc_range - map vmalloc pages to userspace
|
||||
* @vma: vma to cover (map full range of vma)
|
||||
* @addr: vmalloc memory
|
||||
* @pgoff: number of pages into addr before first page to map
|
||||
*
|
||||
* Returns: 0 for success, -Exxx on failure
|
||||
* Returns: 0 for success, -Exxx on failure
|
||||
*
|
||||
* This function checks that addr is a valid vmalloc'ed area, and
|
||||
* that it is big enough to cover the vma. Will return failure if
|
||||
* that criteria isn't met.
|
||||
* This function checks that addr is a valid vmalloc'ed area, and
|
||||
* that it is big enough to cover the vma. Will return failure if
|
||||
* that criteria isn't met.
|
||||
*
|
||||
* Similar to remap_pfn_range() (see mm/memory.c)
|
||||
* Similar to remap_pfn_range() (see mm/memory.c)
|
||||
*/
|
||||
int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
|
||||
unsigned long pgoff)
|
||||
@ -2319,18 +2317,18 @@ static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data)
|
||||
}
|
||||
|
||||
/**
|
||||
* alloc_vm_area - allocate a range of kernel address space
|
||||
* @size: size of the area
|
||||
* @ptes: returns the PTEs for the address space
|
||||
* alloc_vm_area - allocate a range of kernel address space
|
||||
* @size: size of the area
|
||||
* @ptes: returns the PTEs for the address space
|
||||
*
|
||||
* Returns: NULL on failure, vm_struct on success
|
||||
* Returns: NULL on failure, vm_struct on success
|
||||
*
|
||||
* This function reserves a range of kernel address space, and
|
||||
* allocates pagetables to map that range. No actual mappings
|
||||
* are created.
|
||||
* This function reserves a range of kernel address space, and
|
||||
* allocates pagetables to map that range. No actual mappings
|
||||
* are created.
|
||||
*
|
||||
* If @ptes is non-NULL, pointers to the PTEs (in init_mm)
|
||||
* allocated for the VM area are returned.
|
||||
* If @ptes is non-NULL, pointers to the PTEs (in init_mm)
|
||||
* allocated for the VM area are returned.
|
||||
*/
|
||||
struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes)
|
||||
{
|
||||
@ -2756,4 +2754,3 @@ static int __init proc_vmalloc_init(void)
|
||||
module_init(proc_vmalloc_init);
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user