[tip:x86/apic] x86/apic: Remove noisy zero-mask warning from default_send_IPI_mask_logical()

[tip-bot for Dave Jones]

Commit-ID:  e3f0f36ddf1b2743a0d4ea312996536a9c37e1c7
Gitweb:     http://git.kernel.org/tip/e3f0f36ddf1b2743a0d4ea312996536a9c37e1c7
Author:     Dave Jones <davej@xxxxxxxxxx>
AuthorDate: Fri, 18 Jan 2013 12:58:47 -0500
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 24 Jan 2013 12:12:42 +0100

x86/apic: Remove noisy zero-mask warning from default_send_IPI_mask_logical()

Since circa 3.5, we've had dozens of reports of people hitting
this warning. Forwarded reports have been met with silence, so
just remove the warning if no-one cares.

Example reports:

  https://bugzilla.redhat.com/show_bug.cgi?id=797687
  https://bugzilla.redhat.com/show_bug.cgi?id=867174
  https://bugzilla.redhat.com/show_bug.cgi?id=894865

Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20130118175847.GA27662@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/kernel/apic/ipi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index cce91bf..7434d85 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -106,7 +106,7 @@ void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
 	unsigned long mask = cpumask_bits(cpumask)[0];
 	unsigned long flags;
 
-	if (WARN_ONCE(!mask, "empty IPI mask"))
+	if (!mask)
 		return;
 
 	local_irq_save(flags);
--
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