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| author | Peter Zijlstra <peterz@infradead.org> | 2011-07-27 12:17:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-15 18:31:43 -0700 |
| commit | 0db4b32c1f389165369b384fd13200277202cdd0 (patch) | |
| tree | 71d977341f1b7e117c4464d1c87c23dad3ddaec2 | |
| parent | 8af1028380467f993573b5eef904522b9e2f5951 (diff) | |
| download | lwn-0db4b32c1f389165369b384fd13200277202cdd0.tar.gz lwn-0db4b32c1f389165369b384fd13200277202cdd0.zip | |
mm: Fix fixup_user_fault() for MMU=n
commit 5c723ba5b7886909b2e430f2eae454c33f7fe5c6 upstream.
In commit 2efaca927f5c ("mm/futex: fix futex writes on archs with SW
tracking of dirty & young") we forgot about MMU=n. This patch fixes
that.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/1311761831.24752.413.camel@twins
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | include/linux/mm.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 1036614df0c5..ec6e33d4ed0c 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -959,6 +959,8 @@ int invalidate_inode_page(struct page *page); #ifdef CONFIG_MMU extern int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, unsigned int flags); +extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, + unsigned long address, unsigned int fault_flags); #else static inline int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, @@ -968,6 +970,14 @@ static inline int handle_mm_fault(struct mm_struct *mm, BUG(); return VM_FAULT_SIGBUS; } +static inline int fixup_user_fault(struct task_struct *tsk, + struct mm_struct *mm, unsigned long address, + unsigned int fault_flags) +{ + /* should never happen if there's no MMU */ + BUG(); + return -EFAULT; +} #endif extern int make_pages_present(unsigned long addr, unsigned long end); @@ -985,8 +995,6 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm, int get_user_pages_fast(unsigned long start, int nr_pages, int write, struct page **pages); struct page *get_dump_page(unsigned long addr); -extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, - unsigned long address, unsigned int fault_flags); extern int try_to_release_page(struct page * page, gfp_t gfp_mask); extern void do_invalidatepage(struct page *page, unsigned long offset); |