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mm: treewide: clarify pgtable_page_{ctor,dtor}() naming

Browse Source 
The naming of pgtable_page_{ctor,dtor}() seems to have confused a few
people, and until recently arm64 used these erroneously/pointlessly for
other levels of page table.

To make it incredibly clear that these only apply to the PTE level, and to
align with the naming of pgtable_pmd_page_{ctor,dtor}(), let's rename them
to pgtable_pte_page_{ctor,dtor}().

These changes were generated with the following shell script:

----
git grep -lw 'pgtable_page_.tor' | while read FILE; do
    sed -i '{s/pgtable_page_ctor/pgtable_pte_page_ctor/}' $FILE;
    sed -i '{s/pgtable_page_dtor/pgtable_pte_page_dtor/}' $FILE;
done
----

... with the documentation re-flowed to remain under 80 columns, and
whitespace fixed up in macros to keep backslashes aligned.

There should be no functional change as a result of this patch.

Link: http://lkml.kernel.org/r/20190722141133.3116-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mark Rutland 2019-09-25 16:49:46 -07:00 committed by Linus Torvalds
parent cc22c800e1
commit b4ed71f557
26 changed files with 48 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/vm/split_page_table_lock.rst
View File

@ -54,9 +54,9 @@ Hugetlb-specific helpers:
Support of split page table lock by an architecture
===================================================
There's no need in special enabling of PTE split page table lock:
everything required is done by pgtable_page_ctor() and pgtable_page_dtor(),
which must be called on PTE table allocation / freeing.
There's no need in special enabling of PTE split page table lock: everything
required is done by pgtable_pte_page_ctor() and pgtable_pte_page_dtor(), which
must be called on PTE table allocation / freeing.
Make sure the architecture doesn't use slab allocator for page table
allocation: slab uses page->slab_cache for its pages.
@ -74,7 +74,7 @@ paths: i.e X86_PAE preallocate few PMDs on pgd_alloc().
With everything in place you can set CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK.
NOTE: pgtable_page_ctor() and pgtable_pmd_page_ctor() can fail -- it must
NOTE: pgtable_pte_page_ctor() and pgtable_pmd_page_ctor() can fail -- it must
be handled properly.
page->ptl
@ -94,7 +94,7 @@ trick:
split lock with enabled DEBUG_SPINLOCK or DEBUG_LOCK_ALLOC, but costs
one more cache line for indirect access;
The spinlock_t allocated in pgtable_page_ctor() for PTE table and in
The spinlock_t allocated in pgtable_pte_page_ctor() for PTE table and in
pgtable_pmd_page_ctor() for PMD table.
Please, never access page->ptl directly -- use appropriate helper.

4
arch/arc/include/asm/pgalloc.h
View File

@ -108,7 +108,7 @@ pte_alloc_one(struct mm_struct *mm)
return 0;
memzero((void *)pte_pg, PTRS_PER_PTE * sizeof(pte_t));
page = virt_to_page(pte_pg);
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return 0;
}
@ -123,7 +123,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t ptep)
{
pgtable_page_dtor(virt_to_page(ptep));
pgtable_pte_page_dtor(virt_to_page(ptep));
free_pages((unsigned long)ptep, __get_order_pte());
}

2
arch/arm/include/asm/tlb.h
View File

@ -44,7 +44,7 @@ static inline void __tlb_remove_table(void *_table)
static inline void
__pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr)
{
pgtable_page_dtor(pte);
pgtable_pte_page_dtor(pte);
#ifndef CONFIG_ARM_LPAE
/*

2
arch/arm/mm/mmu.c
View File

@ -731,7 +731,7 @@ static void *__init late_alloc(unsigned long sz)
{
void *ptr = (void *)__get_free_pages(GFP_PGTABLE_KERNEL, get_order(sz));
if (!ptr || !pgtable_page_ctor(virt_to_page(ptr)))
if (!ptr || !pgtable_pte_page_ctor(virt_to_page(ptr)))
BUG();
return ptr;
}

2
arch/arm64/include/asm/tlb.h
View File

@ -44,7 +44,7 @@ static inline void tlb_flush(struct mmu_gather *tlb)
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
unsigned long addr)
{
pgtable_page_dtor(pte);
pgtable_pte_page_dtor(pte);
tlb_remove_table(tlb, pte);
}

2
arch/arm64/mm/mmu.c
View File

@ -384,7 +384,7 @@ static phys_addr_t pgd_pgtable_alloc(int shift)
* folded, and if so pgtable_pmd_page_ctor() becomes nop.
*/
if (shift == PAGE_SHIFT)
BUG_ON(!pgtable_page_ctor(phys_to_page(pa)));
BUG_ON(!pgtable_pte_page_ctor(phys_to_page(pa)));
else if (shift == PMD_SHIFT)
BUG_ON(!pgtable_pmd_page_ctor(phys_to_page(pa)));

2
arch/csky/include/asm/pgalloc.h
View File

@ -71,7 +71,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
#define __pte_free_tlb(tlb, pte, address) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page(tlb, pte); \
} while (0)

2
arch/hexagon/include/asm/pgalloc.h
View File

@ -94,7 +94,7 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
#define __pte_free_tlb(tlb, pte, addr) \
do { \
pgtable_page_dtor((pte)); \
pgtable_pte_page_dtor((pte)); \
tlb_remove_page((tlb), (pte)); \
} while (0)

6
arch/m68k/include/asm/mcf_pgalloc.h
View File

@ -41,7 +41,7 @@ extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
unsigned long address)
{
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
}
@ -54,7 +54,7 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm)
if (!page)
return NULL;
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
@ -73,7 +73,7 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm)
static inline void pte_free(struct mm_struct *mm, struct page *page)
{
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
}

6
arch/m68k/include/asm/motorola_pgalloc.h
View File

@ -36,7 +36,7 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
if(!page)
return NULL;
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
@ -51,7 +51,7 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
static inline void pte_free(struct mm_struct *mm, pgtable_t page)
{
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
cache_page(kmap(page));
kunmap(page);
__free_page(page);
@ -60,7 +60,7 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t page)
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
unsigned long address)
{
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
cache_page(kmap(page));
kunmap(page);
__free_page(page);

2
arch/m68k/include/asm/sun3_pgalloc.h
View File

@ -21,7 +21,7 @@ extern const char bad_pmd_string[];
#define __pte_free_tlb(tlb,pte,addr) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)

2
arch/mips/include/asm/pgalloc.h
View File

@ -54,7 +54,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
#define __pte_free_tlb(tlb,pte,address) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)

2
arch/nios2/include/asm/pgalloc.h
View File

@ -41,7 +41,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
#define __pte_free_tlb(tlb, pte, addr) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), (pte)); \
} while (0)

6
arch/openrisc/include/asm/pgalloc.h
View File

@ -75,7 +75,7 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm)
if (!pte)
return NULL;
clear_page(page_address(pte));
if (!pgtable_page_ctor(pte)) {
if (!pgtable_pte_page_ctor(pte)) {
__free_page(pte);
return NULL;
}
@ -89,13 +89,13 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
static inline void pte_free(struct mm_struct *mm, struct page *pte)
{
pgtable_page_dtor(pte);
pgtable_pte_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb, pte, addr) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), (pte)); \
} while (0)

6
arch/powerpc/mm/pgtable-frag.c
View File

@ -25,7 +25,7 @@ void pte_frag_destroy(void *pte_frag)
count = ((unsigned long)pte_frag & ~PAGE_MASK) >> PTE_FRAG_SIZE_SHIFT;
/* We allow PTE_FRAG_NR fragments from a PTE page */
if (atomic_sub_and_test(PTE_FRAG_NR - count, &page->pt_frag_refcount)) {
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
}
}
@ -61,7 +61,7 @@ static pte_t *__alloc_for_ptecache(struct mm_struct *mm, int kernel)
page = alloc_page(PGALLOC_GFP | __GFP_ACCOUNT);
if (!page)
return NULL;
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
@ -113,7 +113,7 @@ void pte_fragment_free(unsigned long *table, int kernel)
BUG_ON(atomic_read(&page->pt_frag_refcount) <= 0);
if (atomic_dec_and_test(&page->pt_frag_refcount)) {
if (!kernel)
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
}
}

2
arch/riscv/include/asm/pgalloc.h
View File

@ -78,7 +78,7 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
#define __pte_free_tlb(tlb, pte, buf) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)

6
arch/s390/mm/pgalloc.c
View File

@ -210,7 +210,7 @@ unsigned long *page_table_alloc(struct mm_struct *mm)
page = alloc_page(GFP_KERNEL);
if (!page)
return NULL;
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
@ -256,7 +256,7 @@ void page_table_free(struct mm_struct *mm, unsigned long *table)
atomic_xor_bits(&page->_refcount, 3U << 24);
}
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
}
@ -308,7 +308,7 @@ void __tlb_remove_table(void *_table)
case 3: /* 4K page table with pgstes */
if (mask & 3)
atomic_xor_bits(&page->_refcount, 3 << 24);
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
break;
}

2
arch/sh/include/asm/pgalloc.h
View File

@ -29,7 +29,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
#define __pte_free_tlb(tlb,pte,addr) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), (pte)); \
} while (0)

4
arch/sparc/mm/init_64.c
View File

@ -2903,7 +2903,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm)
struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (!page)
return NULL;
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
free_unref_page(page);
return NULL;
}
@ -2919,7 +2919,7 @@ static void __pte_free(pgtable_t pte)
{
struct page *page = virt_to_page(pte);
pgtable_page_dtor(page);
pgtable_pte_page_dtor(page);
__free_page(page);
}

4
arch/sparc/mm/srmmu.c
View File

@ -378,7 +378,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm)
if ((pte = (unsigned long)pte_alloc_one_kernel(mm)) == 0)
return NULL;
page = pfn_to_page(__nocache_pa(pte) >> PAGE_SHIFT);
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
@ -389,7 +389,7 @@ void pte_free(struct mm_struct *mm, pgtable_t pte)
{
unsigned long p;
pgtable_page_dtor(pte);
pgtable_pte_page_dtor(pte);
p = (unsigned long)page_address(pte); /* Cached address (for test) */
if (p == 0)
BUG();

2
arch/um/include/asm/pgalloc.h
View File

@ -29,7 +29,7 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
#define __pte_free_tlb(tlb,pte, address) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb),(pte)); \
} while (0)

2
arch/unicore32/include/asm/tlb.h
View File

@ -15,7 +15,7 @@
#define __pte_free_tlb(tlb, pte, addr) \
do { \
pgtable_page_dtor(pte); \
pgtable_pte_page_dtor(pte); \
tlb_remove_page((tlb), (pte)); \
} while (0)

2
arch/x86/mm/pgtable.c
View File

@ -45,7 +45,7 @@ early_param("userpte", setup_userpte);
void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
{
pgtable_page_dtor(pte);
pgtable_pte_page_dtor(pte);
paravirt_release_pte(page_to_pfn(pte));
paravirt_tlb_remove_table(tlb, pte);
}

4
arch/xtensa/include/asm/pgalloc.h
View File

@ -55,7 +55,7 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
if (!pte)
return NULL;
page = virt_to_page(pte);
if (!pgtable_page_ctor(page)) {
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
@ -69,7 +69,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
pgtable_pte_page_dtor(pte);
__free_page(pte);
}
#define pmd_pgtable(pmd) pmd_page(pmd)

8
include/asm-generic/pgalloc.h
View File

@ -49,7 +49,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
* @mm: the mm_struct of the current context
* @gfp: GFP flags to use for the allocation
*
* Allocates a page and runs the pgtable_page_ctor().
* Allocates a page and runs the pgtable_pte_page_ctor().
*
* This function is intended for architectures that need
* anything beyond simple page allocation or must have custom GFP flags.
@ -63,7 +63,7 @@ static inline pgtable_t __pte_alloc_one(struct mm_struct *mm, gfp_t gfp)
pte = alloc_page(gfp);
if (!pte)
return NULL;
if (!pgtable_page_ctor(pte)) {
if (!pgtable_pte_page_ctor(pte)) {
__free_page(pte);
return NULL;
}
@ -76,7 +76,7 @@ static inline pgtable_t __pte_alloc_one(struct mm_struct *mm, gfp_t gfp)
* pte_alloc_one - allocate a page for PTE-level user page table
* @mm: the mm_struct of the current context
*
* Allocates a page and runs the pgtable_page_ctor().
* Allocates a page and runs the pgtable_pte_page_ctor().
*
* Return: `struct page` initialized as page table or %NULL on error
*/
@ -98,7 +98,7 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
*/
static inline void pte_free(struct mm_struct *mm, struct page *pte_page)
{
pgtable_page_dtor(pte_page);
pgtable_pte_page_dtor(pte_page);
__free_page(pte_page);
}

4
include/linux/mm.h
View File

@ -1949,7 +1949,7 @@ static inline void pgtable_init(void)
pgtable_cache_init();
}
static inline bool pgtable_page_ctor(struct page *page)
static inline bool pgtable_pte_page_ctor(struct page *page)
{
if (!ptlock_init(page))
return false;
@ -1958,7 +1958,7 @@ static inline bool pgtable_page_ctor(struct page *page)
return true;
}
static inline void pgtable_page_dtor(struct page *page)
static inline void pgtable_pte_page_dtor(struct page *page)
{
ptlock_free(page);
__ClearPageTable(page);