[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>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/softirq.c b/kernel/softirq.c
index b4ab6af1dea8..31007d6542cc 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -86,7 +86,7 @@ restart:
         /* Reset the pending bitmask before enabling irqs */
         local_softirq_pending() = 0;
 
-        local_irq_enable();
+        //local_irq_enable();
 
         h = softirq_vec;
 
@@ -99,7 +99,7 @@ restart:
                 pending >>= 1;
         } while (pending);
 
-        local_irq_disable();
+        //local_irq_disable();
 
         pending = local_softirq_pending();
         if (pending && --max_restart)