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x86, ftrace: Use safe noops, drop trap test
authorH. Peter Anvin <hpa@zytor.com>
Thu, 28 Oct 2010 04:09:15 +0000 (21:09 -0700)
committerSteven Rostedt <rostedt@goodmis.org>
Fri, 29 Oct 2010 17:07:59 +0000 (13:07 -0400)
commit2d1d7126bbde53989f1d7de174816c123bb7ecb0
treea29e74a2a9e8ad6e8086acd2c242de14b6fa2755tree | snapshot
parentf0daed0242d514033b9ecca9187108d3c4e281a5commit | diff
x86, ftrace: Use safe noops, drop trap test

Always use a safe 5-byte noop sequence.  Drop the trap test, since it
is known to return false negatives on some virtualization platforms on
32 bits.  The resulting code is both simpler and safer.

Cc: Daniel Drake <dsd@laptop.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
arch/x86/kernel/alternative.c diff | blob | history
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