[PATCH] x86_64: Switch to the interrupt stack when running a softirq in local_bh_enable()
This avoids some potential stack overflows with very deep softirq callchains.
i386 does this too.
TOADD CFI annotation
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/softirq.c b/kernel/softirq.c
index b4ab6af..31007d6 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -86,7 +86,7 @@
/* Reset the pending bitmask before enabling irqs */
local_softirq_pending() = 0;
- local_irq_enable();
+ //local_irq_enable();
h = softirq_vec;
@@ -99,7 +99,7 @@
pending >>= 1;
} while (pending);
- local_irq_disable();
+ //local_irq_disable();
pending = local_softirq_pending();
if (pending && --max_restart)