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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2006-07-14 00:24:18 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-14 21:53:54 -0700
commita4afee02a5dd4f20c08fca26e9b610e72d0bcbf0 (patch)
treedb8bbc29bd16ab083b6d5cfe1de90d78cc0878a7
parent3e143475c22036847f898d7e76ba337c1d7dbf6f (diff)
downloadlinux-stericsson-a4afee02a5dd4f20c08fca26e9b610e72d0bcbf0.tar.gz
[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>
-rw-r--r--kernel/acct.c4
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(&current->sighand->siglock);
+ spin_lock_irq(&current->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(&current->sighand->siglock);
+ spin_unlock_irq(&current->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);