diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-11-02 21:37:36 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-03 00:06:58 +0100 |
| commit | b35a35b556f5e6b7993ad0baf20173e75c09ce8c (patch) | |
| tree | 85ea46dde6e97d4c73b724698fd65a403529953e /arch | |
| parent | sparc: gup_pte_range() support THP based tail recounting (diff) | |
| download | linux-b35a35b556f5e6b7993ad0baf20173e75c09ce8c.tar.xz linux-b35a35b556f5e6b7993ad0baf20173e75c09ce8c.zip | |
thp: share get_huge_page_tail()
This avoids duplicating the function in every arch gup_fast.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 11 | ||||
| -rw-r--r-- | arch/s390/mm/gup.c | 11 | ||||
| -rw-r--r-- | arch/sparc/mm/gup.c | 11 | ||||
| -rw-r--r-- | arch/x86/mm/gup.c | 11 |
4 files changed, 0 insertions, 44 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 1c59d94f5942..da5eb3885702 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -385,17 +385,6 @@ follow_huge_pmd(struct mm_struct *mm, unsigned long address, return NULL; } -static inline void get_huge_page_tail(struct page *page) -{ - /* - * __split_huge_page_refcount() cannot run - * from under us. - */ - VM_BUG_ON(page_mapcount(page) < 0); - VM_BUG_ON(atomic_read(&page->_count) != 0); - atomic_inc(&page->_mapcount); -} - static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index da33a0281d9d..65cb06e2af4e 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -48,17 +48,6 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr, return 1; } -static inline void get_huge_page_tail(struct page *page) -{ - /* - * __split_huge_page_refcount() cannot run - * from under us. - */ - VM_BUG_ON(page_mapcount(page) < 0); - VM_BUG_ON(atomic_read(&page->_count) != 0); - atomic_inc(&page->_mapcount); -} - static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c index afcebac144fb..42c55df3aec3 100644 --- a/arch/sparc/mm/gup.c +++ b/arch/sparc/mm/gup.c @@ -12,17 +12,6 @@ #include <linux/rwsem.h> #include <asm/pgtable.h> -static inline void get_huge_page_tail(struct page *page) -{ - /* - * __split_huge_page_refcount() cannot run - * from under us. - */ - VM_BUG_ON(page_mapcount(page) < 0); - VM_BUG_ON(atomic_read(&page->_count) != 0); - atomic_inc(&page->_mapcount); -} - /* * The performance critical leaf functions are made noinline otherwise gcc * inlines everything into a single function which results in too much diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c index 3b5032a62b0f..ea305856151c 100644 --- a/arch/x86/mm/gup.c +++ b/arch/x86/mm/gup.c @@ -108,17 +108,6 @@ static inline void get_head_page_multiple(struct page *page, int nr) SetPageReferenced(page); } -static inline void get_huge_page_tail(struct page *page) -{ - /* - * __split_huge_page_refcount() cannot run - * from under us. - */ - VM_BUG_ON(page_mapcount(page) < 0); - VM_BUG_ON(atomic_read(&page->_count) != 0); - atomic_inc(&page->_mapcount); -} - static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { |