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Commit 8b8b4988 authored by Eric Dumazet's avatar Eric Dumazet Committed by Linus Torvalds
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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 608dfddd (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: default avatarEric Dumazet <dada1@cosmosbay.com>
Cc: Mike Travis <travis@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f7c5a770

drivers/oprofile/cpu_buffer.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

drivers/oprofile/cpu_buffer.h

+1 −1
Original line number Diff line number Diff line
@@ -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);