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| author | Mike Frysinger <vapier.adi@gmail.com> | 2007-10-16 23:26:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:50 -0700 |
| commit | 0b15d04af3dd996035d8fa81fc849d049171f9c3 (patch) | |
| tree | cb0dc973b6485edb6fdf0bcdf4a2eeef9a48adad /include/linux | |
| parent | d823e3e7541c39b4dfe9c79dbf052b4c39da2965 (diff) | |
| download | linux-0b15d04af3dd996035d8fa81fc849d049171f9c3.tar.gz linux-0b15d04af3dd996035d8fa81fc849d049171f9c3.tar.bz2 linux-0b15d04af3dd996035d8fa81fc849d049171f9c3.zip | |
printk: add interfaces for external access to the log buffer
Add two new functions for reading the kernel log buffer. The intention is for
them to be used by recovery/dump/debug code so the kernel log can be easily
retrieved/parsed in a crash scenario, but they are generic enough for other
people to dream up other fun uses.
[akpm@linux-foundation.org: buncha fixes]
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Robin Getz <rgetz@blackfin.uclinux.org>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/kernel.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 5fdbc814c2eb..c680e1e6e9a3 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -172,6 +172,9 @@ asmlinkage int vprintk(const char *fmt, va_list args) __attribute__ ((format (printf, 1, 0))); asmlinkage int printk(const char * fmt, ...) __attribute__ ((format (printf, 1, 2))) __cold; +extern int log_buf_get_len(void); +extern int log_buf_read(int idx); +extern int log_buf_copy(char *dest, int idx, int len); #else static inline int vprintk(const char *s, va_list args) __attribute__ ((format (printf, 1, 0))); @@ -179,6 +182,9 @@ static inline int vprintk(const char *s, va_list args) { return 0; } static inline int printk(const char *s, ...) __attribute__ ((format (printf, 1, 2))); static inline int __cold printk(const char *s, ...) { return 0; } +static inline int log_buf_get_len(void) { return 0; } +static inline int log_buf_read(int idx) { return 0; } +static inline int log_buf_copy(char *dest, int idx, int len) { return 0; } #endif unsigned long int_sqrt(unsigned long); |