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| author | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2006-07-14 00:24:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 21:53:54 -0700 |
| commit | a4afee02a5dd4f20c08fca26e9b610e72d0bcbf0 (patch) | |
| tree | db8bbc29bd16ab083b6d5cfe1de90d78cc0878a7 /kernel | |
| parent | 3e143475c22036847f898d7e76ba337c1d7dbf6f (diff) | |
| download | lwn-a4afee02a5dd4f20c08fca26e9b610e72d0bcbf0.tar.gz lwn-a4afee02a5dd4f20c08fca26e9b610e72d0bcbf0.zip | |
[PATCH] Fix sighand->siglock usage in kernel/acct.c
IRQs must be disabled before taking ->siglock.
Noticed by lockdep.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/acct.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/acct.c b/kernel/acct.c index f18e0b8df3e1..2a7c933651c7 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -488,7 +488,7 @@ static void do_acct_process(struct file *file) old_encode_dev(tty_devnum(current->signal->tty)) : 0; read_unlock(&tasklist_lock); - spin_lock(¤t->sighand->siglock); + spin_lock_irq(¤t->sighand->siglock); ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime))); ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime))); ac.ac_flag = pacct->ac_flag; @@ -496,7 +496,7 @@ static void do_acct_process(struct file *file) ac.ac_minflt = encode_comp_t(pacct->ac_minflt); ac.ac_majflt = encode_comp_t(pacct->ac_majflt); ac.ac_exitcode = pacct->ac_exitcode; - spin_unlock(¤t->sighand->siglock); + spin_unlock_irq(¤t->sighand->siglock); ac.ac_io = encode_comp_t(0 /* current->io_usage */); /* %% */ ac.ac_rw = encode_comp_t(ac.ac_io / 1024); ac.ac_swaps = encode_comp_t(0); |