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authorJoe Perches <joe@perches.com>2012-07-31 01:40:09 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-31 04:25:13 +0400
commitacc8fa41ad31c576cdbc569cc3e0e443b1b98b44 (patch)
tree74b4072203646bd7432249e57f5a1505fa346b5e /include/linux/printk.h
parentcdf53441368cc02ee4aa8a8343a5dc25132836f0 (diff)
downloadlinux-acc8fa41ad31c576cdbc569cc3e0e443b1b98b44.tar.xz
printk: add generic functions to find KERN_<LEVEL> headers
The current form of a KERN_<LEVEL> is "<.>". Add printk_get_level and printk_skip_level functions to handle these formats. These functions centralize tests of KERN_<LEVEL> so a future modification can change the KERN_<LEVEL> style and shorten the number of bytes consumed by these headers. [akpm@linux-foundation.org: fix build error and warning] Signed-off-by: Joe Perches <joe@perches.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Wu Fengguang <wfg@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/printk.h')
-rw-r--r--include/linux/printk.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 1bec2f7a2d42..6e12e1f09047 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -24,6 +24,32 @@ extern const char linux_proc_banner[];
*/
#define KERN_CONT "<c>"
+static inline int printk_get_level(const char *buffer)
+{
+ if (buffer[0] == '<' && buffer[1] && buffer[2] == '>') {
+ switch (buffer[1]) {
+ case '0' ... '7':
+ case 'd': /* KERN_DEFAULT */
+ case 'c': /* KERN_CONT */
+ return buffer[1];
+ }
+ }
+ return 0;
+}
+
+static inline const char *printk_skip_level(const char *buffer)
+{
+ if (printk_get_level(buffer)) {
+ switch (buffer[1]) {
+ case '0' ... '7':
+ case 'd': /* KERN_DEFAULT */
+ case 'c': /* KERN_CONT */
+ return buffer + 3;
+ }
+ }
+ return buffer;
+}
+
extern int console_printk[];
#define console_loglevel (console_printk[0])