aboutsummaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
authorAndrew Morton <akpm@osdl.org>2005-07-27 11:43:54 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-27 16:25:53 -0700
commit1aaf18ff9de1f37bf674236fc0779c3aaa65b998 (patch)
tree53df4d3dd0fbd81b79d5cdb63cf0d11853307a6b /lib
parent0cfc11ed45e4c00750039e5a18c0fc0d681e19db (diff)
[PATCH] check_user_page_readable() deadlock fix
Fix bug identifued by Richard Purdie <rpurdie@rpsys.net>. oprofile calls check_user_page_readable() from interrupt context, so we deadlock over various VFS locks. But check_user_page_readable() doesn't imply either a read or a write of the page's contents. Change __follow_page() so that check_user_page_readable() can tell __follow_page() that we're not accessing the page's contents, and use that info to avoid the troublesome lock-takings. Also, make follow_page() inline for the single callsite in memory.c to save a bit of stack space. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions

Privacy Policy