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* [PATCH] block/xen-blkback: Deinline put_free_pages, save 645 bytes
@ 2016-03-13 19:27 Denys Vlasenko
  0 siblings, 0 replies; only message in thread
From: Denys Vlasenko @ 2016-03-13 19:27 UTC (permalink / raw)
  To: Konrad Rzeszutek Wilk, Roger Pau Monné
  Cc: xen-devel, Denys Vlasenko, linux-kernel

This function compiles to 170 bytes of machine code. 7 callsites.

This function has a spinlocked code section,
which is significantly more expensive than call/return overhead.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: xen-devel@lists.xenproject.org
CC: linux-kernel@vger.kernel.org
 drivers/block/xen-blkback/blkback.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 4809c15..86798b4 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -142,7 +142,7 @@ static inline int get_free_page(struct xen_blkif_ring *ring, struct page **page)
 	return 0;
-static inline void put_free_pages(struct xen_blkif_ring *ring, struct page **page,
+static void put_free_pages(struct xen_blkif_ring *ring, struct page **page,
                                   int num)
 	unsigned long flags;

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2016-03-13 19:27 [PATCH] block/xen-blkback: Deinline put_free_pages, save 645 bytes Denys Vlasenko

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