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authorAndré Goddard Rosa <andre.goddard@gmail.com>2009-12-14 18:01:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 08:53:32 -0800
commite7d2860b690d4f3bed6824757c540579638e3d1e (patch)
tree84268ee28893256fd6a6a7e1d4474f61dbee74e7 /arch/s390/kernel/debug.c
parent84c95c9acf088c99d8793d78036b67faa5d0b851 (diff)
tree-wide: convert open calls to remove spaces to skip_spaces() lib function
Makes use of skip_spaces() defined in lib/string.c for removing leading spaces from strings all over the tree. It decreases lib.a code size by 47 bytes and reuses the function tree-wide: text data bss dec hex filename 64688 584 592 65864 10148 (TOTALS-BEFORE) 64641 584 592 65817 10119 (TOTALS-AFTER) Also, while at it, if we see (*str && isspace(*str)), we can be sure to remove the first condition (*str) as the second one (isspace(*str)) also evaluates to 0 whenever *str == 0, making it redundant. In other words, "a char equals zero is never a space". Julia Lawall tried the semantic patch (http://coccinelle.lip6.fr) below, and found occurrences of this pattern on 3 more files: drivers/leds/led-class.c drivers/leds/ledtrig-timer.c drivers/video/output.c @@ expression str; @@ ( // ignore skip_spaces cases while (*str && isspace(*str)) { \(str++;\|++str;\) } | - *str && isspace(*str) ) Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Cc: Julia Lawall <julia@diku.dk> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Neil Brown <neilb@suse.de> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: David Howells <dhowells@redhat.com> Cc: <linux-ext4@vger.kernel.org> Cc: Samuel Ortiz <samuel@sortiz.org> Cc: Patrick McHardy <kaber@trash.net> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390/kernel/debug.c')
-rw-r--r--arch/s390/kernel/debug.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 071c81f179ef..0168472b2fdf 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -18,6 +18,7 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/ctype.h>
+#include <linux/string.h>
#include <linux/sysctl.h>
#include <asm/uaccess.h>
#include <linux/module.h>
@@ -1178,7 +1179,7 @@ debug_get_uint(char *buf)
{
int rc;
- for(; isspace(*buf); buf++);
+ buf = skip_spaces(buf);
rc = simple_strtoul(buf, &buf, 10);
if(*buf){
rc = -EINVAL;