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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-29 02:54:21 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-29 02:54:21 +0200 |
| commit | 9b79022ca909b66e2cd0cfd9248f832fc165f77f (patch) | |
| tree | bcd8c3204886fcbc8422aeb482f8e42c0b5b6124 /arch/arm/Kconfig | |
| parent | include/asm-generic/pgtable-nopmd.h: macros are noxious, reason #435 (diff) | |
| download | linux-9b79022ca909b66e2cd0cfd9248f832fc165f77f.tar.xz linux-9b79022ca909b66e2cd0cfd9248f832fc165f77f.zip | |
Fix 'get_user_pages_fast()' with non-page-aligned start address
Alexey Dobriyan reported trouble with LTP with the new fast-gup code,
and Johannes Weiner debugged it to non-page-aligned addresses, where the
new get_user_pages_fast() code would do all the wrong things, including
just traversing past the end of the requested area due to 'addr' never
matching 'end' exactly.
This is not a pretty fix, and we may actually want to move the alignment
into generic code, leaving just the core code per-arch, but Alexey
verified that the vmsplice01 LTP test doesn't crash with this.
Reported-and-tested-by: Alexey Dobriyan <adobriyan@gmail.com>
Debugged-by: Johannes Weiner <hannes@saeurebad.de>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/Kconfig')
0 files changed, 0 insertions, 0 deletions