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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/deadline-iosched.c
parent80cfd548eed68cf90c5ae9cfcd6b02230cece756 (diff)
downloadconfigs-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/deadline-iosched.c')
-rw-r--r--block/deadline-iosched.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 9cbec09e841..27e494b1bf9 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -19,10 +19,10 @@
/*
* See Documentation/block/deadline-iosched.txt
*/
-static int read_expire = HZ / 2; /* max time before a read is submitted. */
-static int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */
-static int writes_starved = 2; /* max times reads can starve a write */
-static int fifo_batch = 16; /* # of sequential requests treated as one
+static const int read_expire = HZ / 2; /* max time before a read is submitted. */
+static const int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */
+static const int writes_starved = 2; /* max times reads can starve a write */
+static const int fifo_batch = 16; /* # of sequential requests treated as one
by the above parameters. For throughput. */
static const int deadline_hash_shift = 5;