diff options
| author | David S. Miller <davem@davemloft.net> | 2013-10-23 16:28:39 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-10-23 16:49:34 -0400 |
| commit | c3fa32b9764dc45dcf8a2231b1c110abc4a63e0b (patch) | |
| tree | 6cf2896a77b65bec64284681e1c3851eb3263e09 /kernel/softirq.c | |
| parent | 34d92d5315b64a3e5292b7e9511c1bb617227fb6 (diff) | |
| parent | 320437af954cbe66478f1f5e8b34cb5a8d072191 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/usb/qmi_wwan.c
include/net/dst.h
Trivial merge conflicts, both were overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/softirq.c')
| -rw-r--r-- | kernel/softirq.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c index 53cc09ceb0b..d7d498d8cc4 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -328,10 +328,19 @@ void irq_enter(void) static inline void invoke_softirq(void) { - if (!force_irqthreads) - __do_softirq(); - else + if (!force_irqthreads) { + /* + * We can safely execute softirq on the current stack if + * it is the irq stack, because it should be near empty + * at this stage. But we have no way to know if the arch + * calls irq_exit() on the irq stack. So call softirq + * in its own stack to prevent from any overrun on top + * of a potentially deep task stack. + */ + do_softirq(); + } else { wakeup_softirqd(); + } } static inline void tick_irq_exit(void) |