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| author | Sripathi Kodi <sripathik@in.ibm.com> | 2007-07-15 23:39:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:40 -0700 |
| commit | 6175ecfed3c81d388735c75f7a0ad08dc4de02d3 (patch) | |
| tree | 83ac354507db40109bd114c233de2e7c36c92231 /kernel/ptrace.c | |
| parent | e1f4a88c5a15a86124a95ea712213bb7dab2ad99 (diff) | |
| download | lwn-6175ecfed3c81d388735c75f7a0ad08dc4de02d3.tar.gz lwn-6175ecfed3c81d388735c75f7a0ad08dc4de02d3.zip | |
Use write_trylock_irqsave in ptrace_attach
This patch makes ptrace_attach use write_trylock_irqsave().
[akpm@linux-foundation.org: remove unneeded initialisation]
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/ptrace.c')
| -rw-r--r-- | kernel/ptrace.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index ad7949a589dd..b1d11f1c7cf7 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -161,6 +161,7 @@ int ptrace_may_attach(struct task_struct *task) int ptrace_attach(struct task_struct *task) { int retval; + unsigned long flags; audit_ptrace(task); @@ -181,9 +182,7 @@ repeat: * cpu's that may have task_lock). */ task_lock(task); - local_irq_disable(); - if (!write_trylock(&tasklist_lock)) { - local_irq_enable(); + if (!write_trylock_irqsave(&tasklist_lock, flags)) { task_unlock(task); do { cpu_relax(); @@ -211,7 +210,7 @@ repeat: force_sig_specific(SIGSTOP, task); bad: - write_unlock_irq(&tasklist_lock); + write_unlock_irqrestore(&tasklist_lock, flags); task_unlock(task); out: return retval; |