https://bugzilla.kernel.org/show_bug.cgi?id=36222
--- Comment #12 from Török Edwin <edwinto...@gmail.com> 2011-05-30 12:26:19 ---
Bisection tells me this is the offending commit (see below), but I see you
found it too.
commit 349c004e3d31fda23ad225b61861be38047fff16
Author: Christoph Lameter <c...@linux.com>
Date: Sat Mar 12 12:50:10 2011 +0100
x86: A fast way to check capabilities of the current cpu
Add this_cpu_has() which determines if the current cpu has a certain
ability using a segment prefix and a bit test operation.
For that we need to add bit operations to x86s percpu.h.
Many uses of cpu_has use a pointer passed to a function to determine
the current flags. That is no longer necessary after this patch.
However, this patch only converts the straightforward cases where
cpu_has is used with this_cpu_ptr. The rest is work for later.
-tj: Rolled up patch to add x86_ prefix and use percpu_read() instead
of percpu_read_stable().
Signed-off-by: Christoph Lameter <c...@linux.com>
Acked-by: Tejun Heo <t...@kernel.org>
Signed-off-by: Tejun Heo <t...@kernel.org>
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