From: David Lively <dlively@virtualiron.com>
To: xen-devel@lists.xensource.com
Subject: [PATCH] make perfc_valuea actually return the value it reads
Date: Fri, 26 May 2006 11:14:39 -0400 [thread overview]
Message-ID: <44771B5F.6060901@virtualiron.com> (raw)
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The perfc_valuea macro was effectively a no-op. This trivial patch
makes it return the value it reads.
[-- Attachment #2: perfc_valuea-fix.patch --]
[-- Type: text/x-patch, Size: 1112 bytes --]
Make perfc_valuea actually return the value it reads.
Signed-off-by: David Lively <dlively@virtualiron.com>
diff -r ac4a961f7e64 xen/include/xen/perfc.h
--- a/xen/include/xen/perfc.h Thu May 25 22:57:44 2006 +0100
+++ b/xen/include/xen/perfc.h Fri May 26 11:10:33 2006 -0400
@@ -56,10 +56,8 @@ extern struct perfcounter perfcounters;
#define perfc_value(x) atomic_read(&perfcounters.x[0])
#define perfc_valuec(x) atomic_read(&perfcounters.x[smp_processor_id()])
#define perfc_valuea(x,y) \
- do { \
- if ( (y) < (sizeof(perfcounters.x) / sizeof(*perfcounters.x)) ) \
- atomic_read(&perfcounters.x[y]); \
- } while ( 0 )
+ ( (y) < (sizeof(perfcounters.x) / sizeof(*perfcounters.x)) ? \
+ atomic_read(&perfcounters.x[y]) : 0 )
#define perfc_set(x,v) atomic_set(&perfcounters.x[0], v)
#define perfc_setc(x,v) atomic_set(&perfcounters.x[smp_processor_id()], v)
#define perfc_seta(x,y,v) \
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