diff options
| author | Andrew Morton <akpm@osdl.org> | 2005-09-21 09:55:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-21 10:11:54 -0700 |
| commit | 31f6d9d628739c097964b8dbae939ea997da94a3 (patch) | |
| tree | a559531440fbf6685e68ebce5f5a26695ae7d5d9 /kernel/printk.c | |
| parent | 66dcca062847bcd261ebb3ac96d51101f31a8630 (diff) | |
| download | lwn-31f6d9d628739c097964b8dbae939ea997da94a3.tar.gz lwn-31f6d9d628739c097964b8dbae939ea997da94a3.zip | |
[PATCH] Add printk_clock()
ia64's sched_clock() accesses per-cpu data which isn't set up at boot time.
Hence ia64 cannot use printk timestamping, because printk() will crash in
sched_clock().
So make printk() use printk_clock(), defaulting to sched_clock(), overrideable
by the architecture via attribute(weak).
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/printk.c')
| -rw-r--r-- | kernel/printk.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index a967605bc2e3..4b8f0f9230a4 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -488,6 +488,11 @@ static int __init printk_time_setup(char *str) __setup("time", printk_time_setup); +__attribute__((weak)) unsigned long long printk_clock(void) +{ + return sched_clock(); +} + /* * This is printk. It can be called from any context. We want it to work. * @@ -565,7 +570,7 @@ asmlinkage int vprintk(const char *fmt, va_list args) loglev_char = default_message_loglevel + '0'; } - t = sched_clock(); + t = printk_clock(); nanosec_rem = do_div(t, 1000000000); tlen = sprintf(tbuf, "<%c>[%5lu.%06lu] ", |