aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/percpu_counter.h
diff options
context:
space:
mode:
authorPaul Mackerras <paulus@samba.org>2009-01-06 17:41:02 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 18:59:13 -0500
commite3d5a27d5862b6425d0879272e24abecf7245105 (patch)
treec8a873e926d4768ae2ecac50c46c5121c8472876 /include/linux/percpu_counter.h
parentaf9379c7121d5543722c00bbd1adf7dcaa0b6448 (diff)
Allow times and time system calls to return small negative values
At the moment, the times() system call will appear to fail for a period shortly after boot, while the value it want to return is between -4095 and -1. The same thing will also happen for the time() system call on 32-bit platforms some time in 2106 or so. On some platforms, such as x86, this is unavoidable because of the system call ABI, but other platforms such as powerpc have a separate error indication from the return value, so system calls can in fact return small negative values without indicating an error. On those platforms, force_successful_syscall_return() provides a way to indicate that the system call return value should not be treated as an error even if it is in the range which would normally be taken as a negative error number. This adds a force_successful_syscall_return() call to the time() and times() system calls plus their 32-bit compat versions, so that they don't erroneously indicate an error on those platforms whose system call ABI has a separate error indication. This will not affect anything on other platforms. Joakim Tjernlund added the fix for time() and the compat versions of time() and times(), after I did the fix for times(). Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/percpu_counter.h')
0 files changed, 0 insertions, 0 deletions