From: Jens Axboe <axboe@suse.de>
Date: Wed, 27 Jul 2005 18:43:37 +0000 (-0700)
Subject: [PATCH] as-iosched tunable encoding fix
X-Git-Tag: v2.6.16.28-rc1~5284^2~155
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=commitdiff_plain;h=c9b3ad673460fc997a652cd58aa3a345d40e5218

[PATCH] as-iosched tunable encoding fix

AS is doing internal msec<->jiffies conversions twice, so the sysfs tunables
which represent time are coming out wrong.  The switch from HZ=1000 exposed
this.

Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/block/as-iosched.c b/drivers/block/as-iosched.c
index 91aeb678135d..95c0a3690b0f 100644
--- a/drivers/block/as-iosched.c
+++ b/drivers/block/as-iosched.c
@@ -1935,23 +1935,15 @@ struct as_fs_entry {
 static ssize_t
 as_var_show(unsigned int var, char *page)
 {
-	var = (var * 1000) / HZ;
 	return sprintf(page, "%d\n", var);
 }
 
 static ssize_t
 as_var_store(unsigned long *var, const char *page, size_t count)
 {
-	unsigned long tmp;
 	char *p = (char *) page;
 
-	tmp = simple_strtoul(p, &p, 10);
-	if (tmp != 0) {
-		tmp = (tmp * HZ) / 1000;
-		if (tmp == 0)
-			tmp = 1;
-	}
-	*var = tmp;
+	*var = simple_strtoul(p, &p, 10);
 	return count;
 }