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| author |   Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-12-12 17:14:55 +0000 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-13 09:27:08 -0800 |
| commit | 9de455b20705f36384a711d4a20bcf7ba1ab180b (patch) | |
| tree | 6eb3643514d12d06a69a5c889d612f66b68288e6 /mm/memory.c | |
| parent | [PATCH] Fix COW D-cache aliasing on fork (diff) | |
| download | linux-dev-9de455b20705f36384a711d4a20bcf7ba1ab180b.tar.xz linux-dev-9de455b20705f36384a711d4a20bcf7ba1ab180b.zip | |
[PATCH] Pass vma argument to copy_user_highpage().
To allow a more effective copy_user_highpage() on certain architectures,
a vma argument is added to the function and cow_user_page() allowing
the implementation of these functions to check for the VM_EXEC bit.
The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
| -rw-r--r-- | mm/memory.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/memory.c b/mm/memory.c index bf6100236e62..c00bac66ce9f 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1441,7 +1441,7 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma) return pte; } -static inline void cow_user_page(struct page *dst, struct page *src, unsigned long va) +static inline void cow_user_page(struct page *dst, struct page *src, unsigned long va, struct vm_area_struct *vma) { /* * If the source page was a PFN mapping, we don't have @@ -1464,9 +1464,9 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo kunmap_atomic(kaddr, KM_USER0); flush_dcache_page(dst); return; - + } - copy_user_highpage(dst, src, va); + copy_user_highpage(dst, src, va, vma); } /* @@ -1577,7 +1577,7 @@ gotten: new_page = alloc_page_vma(GFP_HIGHUSER, vma, address); if (!new_page) goto oom; - cow_user_page(new_page, old_page, address); + cow_user_page(new_page, old_page, address, vma); } /* @@ -2200,7 +2200,7 @@ retry: page = alloc_page_vma(GFP_HIGHUSER, vma, address); if (!page) goto oom; - copy_user_highpage(page, new_page, address); + copy_user_highpage(page, new_page, address, vma); page_cache_release(new_page); new_page = page; anon = 1; |