Hello!
Some fixes to RCU usage for sighand_struct, adding a couple of needed
rcu_assign_pointer() calls.
Signed-off-by: <[email protected]>
---
diff -urpNa linux-2.6.14-rc5-rt5/fs/exec.c linux-2.6.14-rc5-rt5-sighandRCUfix/fs/exec.c
--- linux-2.6.14-rc5-rt5/fs/exec.c 2005-10-24 05:59:08.000000000 -0700
+++ linux-2.6.14-rc5-rt5-sighandRCUfix/fs/exec.c 2005-10-31 15:38:02.000000000 -0800
@@ -777,7 +777,7 @@ no_thread_group:
spin_lock(&oldsighand->siglock);
spin_lock(&newsighand->siglock);
- current->sighand = newsighand;
+ rcu_assign_pointer(current->sighand, newsighand);
recalc_sigpending();
spin_unlock(&newsighand->siglock);
diff -urpNa linux-2.6.14-rc5-rt5/kernel/fork.c linux-2.6.14-rc5-rt5-sighandRCUfix/kernel/fork.c
--- linux-2.6.14-rc5-rt5/kernel/fork.c 2005-10-24 05:59:08.000000000 -0700
+++ linux-2.6.14-rc5-rt5-sighandRCUfix/kernel/fork.c 2005-10-31 15:35:14.000000000 -0800
@@ -816,7 +816,7 @@ static inline int copy_sighand(unsigned
return 0;
}
sig = kmem_cache_alloc(sighand_cachep, GFP_KERNEL);
- tsk->sighand = sig;
+ rcu_assign_pointer(tsk->sighand, sig);
if (!sig)
return -ENOMEM;
spin_lock_init(&sig->siglock);
-
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