oprofile: don't request cache line alignment for cpu_buffer

Alignment was previously requested because cpu_buffer was an [NR_CPUS]
array, to avoid cache line sharing between CPUS.

After commit 608dfddd845da5ab6accef70154c8910529699f7 (oprofile: change
cpu_buffer from array to per_cpu variable ), we dont need to force an
alignement anymore since cpu_buffer sits in per_cpu zone.

Signed-off-by: Eric Dumazet <[email protected]>
Cc: Mike Travis <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index efcbf4b4579f275bccea1b00fda95891925e4be6..2450b3a393ff37f6ab1bd02d523f38027a838671 100644 (file)
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -27,7 +27,7 @@
 #include "buffer_sync.h"
 #include "oprof.h"
 
-DEFINE_PER_CPU_SHARED_ALIGNED(struct oprofile_cpu_buffer, cpu_buffer);
+DEFINE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);
 
 static void wq_sync_buffer(struct work_struct *work);
 

diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h
index 13588174311d452fc17108717907f23737f0d15d..c3e366b522619bd135964a17022638f4adfdec82 100644 (file)
--- a/drivers/oprofile/cpu_buffer.h
+++ b/drivers/oprofile/cpu_buffer.h
@@ -46,7 +46,7 @@ struct oprofile_cpu_buffer {
        unsigned long sample_invalid_eip;
        int cpu;
        struct delayed_work work;
-} ____cacheline_aligned;
+};
 
 DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);