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authorAndrew Morton <akpm@linux-foundation.org>2008-07-05 01:02:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-05 13:13:44 -0700
commit5d7e0d2bd98ef4f5a16ac9da1987ae655368dd6a (patch)
treea910f821c544bba353324c63e2783852a1b95b11 /Makefile
parentca31e146d5c2fe51498e619eb3a64782d02e310a (diff)
Fix pagemap_read() use of struct mm_walk
Fix some issues in pagemap_read noted by Alexey: - initialize pagemap_walk.mm to "mm" , so the code starts working as advertised - initialize ->private to "&pm" so it wouldn't immediately oops in pagemap_pte_hole() - unstatic struct pagemap_walk, so two threads won't fsckup each other (including those started by root, including flipping ->mm when you don't have permissions) - pagemap_read() contains two calls to ptrace_may_attach(), second one looks unneeded. - avoid possible kmalloc(0) and integer wraparound. Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> [ Personally, I'd just remove the functionality entirely - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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