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 /kernel | |
| parent | kmsg: /dev/kmsg - properly return possible copy_from_user() failure (diff) | |
| download | linux-dev-acc8fa41ad31c576cdbc569cc3e0e443b1b98b44.tar.xz linux-dev-acc8fa41ad31c576cdbc569cc3e0e443b1b98b44.zip | |
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 'kernel')
| -rw-r--r-- | kernel/printk.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index 852269adad25..0d882a2f231e 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -1487,6 +1487,7 @@ asmlinkage int vprintk_emit(int facility, int level, size_t text_len; enum log_flags lflags = 0; unsigned long flags; + int kern_level; int this_cpu; int printed_len = 0; @@ -1543,17 +1544,20 @@ asmlinkage int vprintk_emit(int facility, int level, } /* strip syslog prefix and extract log level or control flags */ - if (text[0] == '<' && text[1] && text[2] == '>') { - switch (text[1]) { + kern_level = printk_get_level(text); + if (kern_level) { + const char *end_of_header = printk_skip_level(text); + switch (kern_level) { case '0' ... '7': if (level == -1) - level = text[1] - '0'; + level = kern_level - '0'; case 'd': /* KERN_DEFAULT */ lflags |= LOG_PREFIX; case 'c': /* KERN_CONT */ - text += 3; - text_len -= 3; + break; } + text_len -= end_of_header - text; + text = (char *)end_of_header; } if (level == -1) |