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mm: convert ptlock_ptr() to use ptdescs

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This removes some direct accesses to struct page, working towards
splitting out struct ptdesc from struct page.

Link: https://lkml.kernel.org/r/20230807230513.102486-7-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Guo Ren <guoren@kernel.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Vishal Moola (Oracle) 2023-08-07 16:04:48 -07:00 committed by Andrew Morton
parent f5ecca06b3
commit 1865484af6
2 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/xen/mmu_pv.c
View File

@ -667,7 +667,7 @@ static spinlock_t *xen_pte_lock(struct page *page, struct mm_struct *mm)
spinlock_t *ptl = NULL;
#if USE_SPLIT_PTE_PTLOCKS
ptl = ptlock_ptr(page);
ptl = ptlock_ptr(page_ptdesc(page));
spin_lock_nest_lock(ptl, &mm->page_table_lock);
#endif

14
include/linux/mm.h
View File

@ -2829,9 +2829,9 @@ void __init ptlock_cache_init(void);
bool ptlock_alloc(struct ptdesc *ptdesc);
extern void ptlock_free(struct page *page);
static inline spinlock_t *ptlock_ptr(struct page *page)
static inline spinlock_t *ptlock_ptr(struct ptdesc *ptdesc)
{
return page->ptl;
return ptdesc->ptl;
}
#else /* ALLOC_SPLIT_PTLOCKS */
static inline void ptlock_cache_init(void)
@ -2847,15 +2847,15 @@ static inline void ptlock_free(struct page *page)
{
}
static inline spinlock_t *ptlock_ptr(struct page *page)
static inline spinlock_t *ptlock_ptr(struct ptdesc *ptdesc)
{
return &page->ptl;
return &ptdesc->ptl;
}
#endif /* ALLOC_SPLIT_PTLOCKS */
static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd)
{
return ptlock_ptr(pmd_page(*pmd));
return ptlock_ptr(page_ptdesc(pmd_page(*pmd)));
}
static inline bool ptlock_init(struct page *page)
@ -2870,7 +2870,7 @@ static inline bool ptlock_init(struct page *page)
VM_BUG_ON_PAGE(*(unsigned long *)&page->ptl, page);
if (!ptlock_alloc(page_ptdesc(page)))
return false;
spin_lock_init(ptlock_ptr(page));
spin_lock_init(ptlock_ptr(page_ptdesc(page)));
return true;
}
@ -2956,7 +2956,7 @@ static inline struct ptdesc *pmd_ptdesc(pmd_t *pmd)
static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd)
{
return ptlock_ptr(ptdesc_page(pmd_ptdesc(pmd)));
return ptlock_ptr(pmd_ptdesc(pmd));
}
static inline bool pmd_ptlock_init(struct page *page)