Re: [PATCH] scripts/checksyscalls.sh: only whine perf_counter_open when supported
From: Mike Frysinger
Date: Fri Jun 12 2009 - 09:44:26 EST
On Fri, Jun 12, 2009 at 08:31, Ingo Molnar wrote:
> That way say build breakages or runtime failures due to perfcounters
> only become possible on an architecture if the architecture
> maintainer has hooked up the syscall
also, this syscall approach is not how any other syscall is handled.
a runtime error along the lines of ENOSYS is trivial to diagnosis and
explain. you get the exact same behavior on supported architectures
running an older kernel or any kernel with the profiling code
disabled, so any userland code should already be sanely handling this.
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