Messages in this thread | | | Date | Sat, 23 Jul 2005 15:35:31 +1000 | From | Andrew Morton <> | Subject | Re: sys_times() return value |
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Russell King <rmk+lkml@arm.linux.org.uk> wrote: > > Guys, > > ARM folk have recently pointed out a problem with sys_times(). > When the kernel boots, we set jiffies to -5 minutes. This causes > sys_times() to return a negative number, which increments through > zero. > > However, some negative numbers are used to return error codes. > Hence, there's a period of time when sys_times() returns values > which are indistinguishable from error codes shortly after boot.
What a strange system call.
> This probably only affects 32-bit architectures. However, one > wonders whether sys_times() needs force_successful_syscall_return().
I'd say so, yes. But lots of architectures seem to have a no-op there.
> Also, it appears that glibc does indeed interpret the return value > from sys_times in the way I describe above on at least ARM and x86. > Other architectures may be similarly affected. Hopefully the ARM > glibc folk will raise a cross-architecture bug in glibc for this. >
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