[PATCH 4.6 027/203] x86/msr: Use the proper trace point conditional for writes
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-07-25 22:28:32
Also in:
lkml
4.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dr. David Alan Gilbert <redacted> commit 08dd8cd06ed95625b9e2fac43c78fcb45b7eaf94 upstream. The msr tracing for writes is incorrectly conditional on the read trace. Fixes: 7f47d8cc039f "x86, tracing, perf: Add trace point for MSR accesses" Signed-off-by: Dr. David Alan Gilbert <redacted> Cc: ak@linux.intel.com Link: http://lkml.kernel.org/r/1464976859-21850-1-git-send-email-dgilbert@redhat.com Signed-off-by: Thomas Gleixner <redacted> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/x86/include/asm/msr.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h@@ -112,7 +112,7 @@ static inline void native_write_msr(unsi unsigned low, unsigned high) { asm volatile("wrmsr" : : "c" (msr), "a"(low), "d" (high) : "memory"); - if (msr_tracepoint_active(__tracepoint_read_msr)) + if (msr_tracepoint_active(__tracepoint_write_msr)) do_trace_write_msr(msr, ((u64)high << 32 | low), 0); }
@@ -131,7 +131,7 @@ notrace static inline int native_write_m : "c" (msr), "0" (low), "d" (high), [fault] "i" (-EIO) : "memory"); - if (msr_tracepoint_active(__tracepoint_read_msr)) + if (msr_tracepoint_active(__tracepoint_write_msr)) do_trace_write_msr(msr, ((u64)high << 32 | low), err); return err; }