tree dc5f0358a164dda9b375272e888b9f2138463e54
parent 4c0587e6e42c5b679234d3dffda8a888dc0ff9c1
author Hugh Dickins <hugh@veritas.com> 1209253176 +0100
committer Ingo Molnar <mingo@elte.hu> 1209469524 +0200

x86: vget_cycles() __always_inline

Mark vget_cycles() as __always_inline, so gcc is never tempted to make
the vsyscall vread_tsc() dive into kernel text, with resulting SIGSEGV.

This was a self-inflicted wound: I've not seen that happen with unhacked
sources; but for debug reasons I'd changed my x86/Makefile to compile
no-unit-at-a-time, and that in conjunction with OPTIMIZE_INLINING=y
ended up with vget_cycles() in kernel text.  Perhaps it can happen
in other ways: safer to use __always_inline.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>