Messages in this thread | | | Date | Mon, 18 Jul 2005 00:24:46 +0100 | From | Russell King <> | Subject | sys_times() return value |
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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.
This probably only affects 32-bit architectures. However, one wonders whether sys_times() needs force_successful_syscall_return().
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.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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