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author | Ingo Molnar <mingo@elte.hu> | 2009-02-05 13:45:43 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-02-05 13:52:29 +0100 |
commit | f036be96dd9ce442ffb9ab33e3c165f5178815c0 (patch) | |
tree | c60c39f895bb93ac0000de7772e89a0b6663954b /lib/Kconfig | |
parent | eda58a85ec3fc05855a26654d97a2b53f0e715b9 (diff) | |
download | lwn-f036be96dd9ce442ffb9ab33e3c165f5178815c0.tar.gz lwn-f036be96dd9ce442ffb9ab33e3c165f5178815c0.zip |
printk: introduce printk_once()
This pattern shows up frequently in the kernel:
static int once = 1;
...
if (once) {
once = 0;
printk(KERN_ERR "message\n");
}
...
So add a printk_once() helper macro that reduces this to a single line
of:
printk_once(KERN_ERR "message\n");
It works analogously to WARN_ONCE() & friends. (We use a macro not
an inline because vararg expansion in inlines looks awkward and the
macro is simple enough.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib/Kconfig')
0 files changed, 0 insertions, 0 deletions