diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-19 13:05:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-19 13:05:38 -0700 |
| commit | a7204d72db251784808b0c050220992d7f833a2c (patch) | |
| tree | 3491452ea74b039f3278fd95bb7ad7c88b6b3631 /kernel/softirq.c | |
| parent | ba6857b2d49646f2d4c245ff58d95d145f380177 (diff) | |
| parent | 31d141e3a666269a3b6fcccddb0351caf7454240 (diff) | |
Merge 3.12-rc6 into driver-core-next
We want these fixes here too.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 53cc09ceb0b8..d7d498d8cc4f 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) |