diff options
| author | Joe Perches <joe@perches.com> | 2012-07-30 14:40:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-30 17:25:13 -0700 |
| commit | acc8fa41ad31c576cdbc569cc3e0e443b1b98b44 (patch) | |
| tree | 74b4072203646bd7432249e57f5a1505fa346b5e /include/linux/printk.h | |
| parent | cdf53441368cc02ee4aa8a8343a5dc25132836f0 (diff) | |
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.h | 26 |
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]) |