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mm: convert __vm_insert_mixed() to vm_fault_t

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Both of its callers currently convert its errno return into a vm_fault_t,
so move the conversion into __vm_insert_mixed().

Link: http://lkml.kernel.org/r/20180828145728.11873-10-willy@infradead.org
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2018-10-26 15:04:37 -07:00 committed by Linus Torvalds
parent 6d958546ff
commit 79f3aa5ba9
1 changed files with 15 additions and 21 deletions
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36
mm/memory.c
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@ -1668,20 +1668,21 @@ static bool vm_mixed_ok(struct vm_area_struct *vma, pfn_t pfn)
return false;
}
static int __vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
pfn_t pfn, bool mkwrite)
static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
unsigned long addr, pfn_t pfn, bool mkwrite)
{
pgprot_t pgprot = vma->vm_page_prot;
int err;
BUG_ON(!vm_mixed_ok(vma, pfn));
if (addr < vma->vm_start || addr >= vma->vm_end)
return -EFAULT;
return VM_FAULT_SIGBUS;
track_pfn_insert(vma, &pgprot, pfn);
if (!pfn_modify_allowed(pfn_t_to_pfn(pfn), pgprot))
return -EACCES;
return VM_FAULT_SIGBUS;
/*
* If we don't have pte special, then we have to use the pfn_valid()
@ -1700,15 +1701,10 @@ static int __vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
* result in pfn_t_has_page() == false.
*/
page = pfn_to_page(pfn_t_to_pfn(pfn));
return insert_page(vma, addr, page, pgprot);
err = insert_page(vma, addr, page, pgprot);
} else {
err = insert_pfn(vma, addr, pfn, pgprot, mkwrite);
}
return insert_pfn(vma, addr, pfn, pgprot, mkwrite);
}
vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
pfn_t pfn)
{
int err = __vm_insert_mixed(vma, addr, pfn, false);
if (err == -ENOMEM)
return VM_FAULT_OOM;
@ -1717,6 +1713,12 @@ vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
return VM_FAULT_NOPAGE;
}
vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
pfn_t pfn)
{
return __vm_insert_mixed(vma, addr, pfn, false);
}
EXPORT_SYMBOL(vmf_insert_mixed);
/*
@ -1724,18 +1726,10 @@ EXPORT_SYMBOL(vmf_insert_mixed);
* different entry in the mean time, we treat that as success as we assume
* the same entry was actually inserted.
*/
vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
unsigned long addr, pfn_t pfn)
{
int err;
err = __vm_insert_mixed(vma, addr, pfn, true);
if (err == -ENOMEM)
return VM_FAULT_OOM;
if (err < 0 && err != -EBUSY)
return VM_FAULT_SIGBUS;
return VM_FAULT_NOPAGE;
return __vm_insert_mixed(vma, addr, pfn, true);
}
EXPORT_SYMBOL(vmf_insert_mixed_mkwrite);