diff options
| author | Alex Elder <elder@linaro.org> | 2014-08-06 16:09:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:24 -0700 |
| commit | 249771b8307e7a91659d8b273f8b70d48c3a7bfc (patch) | |
| tree | e58ae3f8709079eb6cb10999ac42dcd85ae79c8f /kernel | |
| parent | e99aa461660a6413b11da887fb499e04a0f46803 (diff) | |
printk: miscellaneous cleanups
Some small cleanups to kernel/printk/printk.c. None of them should
cause any change in behavior.
- When CONFIG_PRINTK is defined, parenthesize the value of LOG_LINE_MAX.
- When CONFIG_PRINTK is *not* defined, there is an extra LOG_LINE_MAX
definition; delete it.
- Pull an assignment out of a conditional expression in console_setup().
- Use isdigit() in console_setup() rather than open coding it.
- In update_console_cmdline(), drop a NUL-termination assignment;
the strlcpy() call that precedes it guarantees it's not needed.
- Simplify some logic in printk_timed_ratelimit().
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Petr Mladek <pmladek@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jan Kara <jack@suse.cz>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
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/printk.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index ac86838227ed..5eb0e6c800bb 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -45,6 +45,7 @@ #include <linux/poll.h> #include <linux/irq_work.h> #include <linux/utsname.h> +#include <linux/ctype.h> #include <asm/uaccess.h> @@ -257,7 +258,7 @@ static u64 clear_seq; static u32 clear_idx; #define PREFIX_MAX 32 -#define LOG_LINE_MAX 1024 - PREFIX_MAX +#define LOG_LINE_MAX (1024 - PREFIX_MAX) /* record buffer */ #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) @@ -1835,7 +1836,7 @@ EXPORT_SYMBOL(printk); #define LOG_LINE_MAX 0 #define PREFIX_MAX 0 -#define LOG_LINE_MAX 0 + static u64 syslog_seq; static u32 syslog_idx; static u64 console_seq; @@ -1936,7 +1937,8 @@ static int __init console_setup(char *str) strncpy(buf, str, sizeof(buf) - 1); } buf[sizeof(buf) - 1] = 0; - if ((options = strchr(str, ',')) != NULL) + options = strchr(str, ','); + if (options) *(options++) = 0; #ifdef __sparc__ if (!strcmp(str, "ttya")) @@ -1945,7 +1947,7 @@ static int __init console_setup(char *str) strcpy(buf, "ttyS1"); #endif for (s = buf; *s; s++) - if ((*s >= '0' && *s <= '9') || *s == ',') + if (isdigit(*s) || *s == ',') break; idx = simple_strtoul(s, NULL, 10); *s = 0; @@ -1984,7 +1986,6 @@ int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, cha i++, c++) if (strcmp(c->name, name) == 0 && c->index == idx) { strlcpy(c->name, name_new, sizeof(c->name)); - c->name[sizeof(c->name) - 1] = 0; c->options = options; c->index = idx_new; return i; @@ -2652,14 +2653,13 @@ EXPORT_SYMBOL(__printk_ratelimit); bool printk_timed_ratelimit(unsigned long *caller_jiffies, unsigned int interval_msecs) { - if (*caller_jiffies == 0 - || !time_in_range(jiffies, *caller_jiffies, - *caller_jiffies - + msecs_to_jiffies(interval_msecs))) { - *caller_jiffies = jiffies; - return true; - } - return false; + unsigned long elapsed = jiffies - *caller_jiffies; + + if (*caller_jiffies && elapsed <= msecs_to_jiffies(interval_msecs)) + return false; + + *caller_jiffies = jiffies; + return true; } EXPORT_SYMBOL(printk_timed_ratelimit); |