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authorArjan van de Ven <arjan@infradead.org>2006-01-06 09:46:02 +0100
committerJens Axboe <axboe@suse.de>2006-01-06 09:46:02 +0100
commit64100099ed22f71cce656c5c2caecf5c9cf255dc (patch)
treef6ebf7c94ee2eeb080d25880ffca839ec39ec47e /block/cfq-iosched.c
parent80cfd548eed68cf90c5ae9cfcd6b02230cece756 (diff)
downloadlinux-2.6.34-ux500-64100099ed22f71cce656c5c2caecf5c9cf255dc.tar.gz
[BLOCK] mark some block/ variables cons
the patch below marks various read-only variables in block/* as const, so that gcc can optimize the use of them; eg gcc will replace the use by the value directly now and will even remove the memory usage of these. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'block/cfq-iosched.c')
-rw-r--r--block/cfq-iosched.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ee0bb41694b..74fae2daf87 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -25,15 +25,15 @@
/*
* tunables
*/
-static int cfq_quantum = 4; /* max queue in one round of service */
-static int cfq_queued = 8; /* minimum rq allocate limit per-queue*/
-static int cfq_fifo_expire[2] = { HZ / 4, HZ / 8 };
-static int cfq_back_max = 16 * 1024; /* maximum backwards seek, in KiB */
-static int cfq_back_penalty = 2; /* penalty of a backwards seek */
+static const int cfq_quantum = 4; /* max queue in one round of service */
+static const int cfq_queued = 8; /* minimum rq allocate limit per-queue*/
+static const int cfq_fifo_expire[2] = { HZ / 4, HZ / 8 };
+static const int cfq_back_max = 16 * 1024; /* maximum backwards seek, in KiB */
+static const int cfq_back_penalty = 2; /* penalty of a backwards seek */
-static int cfq_slice_sync = HZ / 10;
+static const int cfq_slice_sync = HZ / 10;
static int cfq_slice_async = HZ / 25;
-static int cfq_slice_async_rq = 2;
+static const int cfq_slice_async_rq = 2;
static int cfq_slice_idle = HZ / 100;
#define CFQ_IDLE_GRACE (HZ / 10)
@@ -45,7 +45,7 @@ static int cfq_slice_idle = HZ / 100;
/*
* disable queueing at the driver/hardware level
*/
-static int cfq_max_depth = 2;
+static const int cfq_max_depth = 2;
/*
* for the hash of cfqq inside the cfqd