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ipmi: work around gcc-4.9 build warning

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Building ipmi on arm with gcc-4.9 results in this warning for an
allmodconfig build:

  drivers/char/ipmi/ipmi_si_intf.c: In function 'ipmi_thread':
  include/linux/time.h:28:5: warning: 'busy_until.tv_sec' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if (lhs->tv_sec > rhs->tv_sec)
       ^
  drivers/char/ipmi/ipmi_si_intf.c:1007:18: note: 'busy_until.tv_sec' was declared here
    struct timespec busy_until;
                    ^

The warning is bogus and this case can not occur.  Apparently this is a
false positive resulting from gcc getting a little smarter about
tracking assignments but not smart enough.

Marking the ipmi_thread_busy_wait function as inline gives the gcc
optimization logic enough information to figure out for itself that the
case cannot happen, which gets rid of the warning without adding any
fake initialization.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2014-10-06 14:17:52 -05:00 committed by Linus Torvalds
parent 08dc41696a
commit cc4cbe9011
1 changed files with 3 additions and 3 deletions
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6
drivers/char/ipmi/ipmi_si_intf.c
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@ -965,9 +965,9 @@ static inline int ipmi_si_is_busy(struct timespec *ts)
return ts->tv_nsec != -1;
}
static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
const struct smi_info *smi_info,
struct timespec *busy_until)
static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result,
const struct smi_info *smi_info,
struct timespec *busy_until)
{
unsigned int max_busy_us = 0;