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author | Mathias Krause <minipli@googlemail.com> | 2014-03-07 08:52:32 +0100 |
---|---|---|
committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-03-11 01:32:01 +0100 |
commit | 6cce16f99d7be23cec7cabdf32a8166eec6e5393 (patch) | |
tree | e73a1d334a61d856905c3656b6a42fc8332760c0 /drivers/gpu/drm/radeon/rv515.c | |
parent | x86: Clean up dumpstack_64.c code (diff) | |
download | linux-6cce16f99d7be23cec7cabdf32a8166eec6e5393.tar.xz linux-6cce16f99d7be23cec7cabdf32a8166eec6e5393.zip |
x86, threadinfo: Redo "x86: Use inline assembler to get sp"
This patch restores the changes of commit dff38e3e93 "x86: Use inline
assembler instead of global register variable to get sp". They got lost
in commit 198d208df4 "x86: Keep thread_info on thread stack in x86_32"
while moving the code to arch/x86/kernel/irq_32.c.
Quoting Andi from commit dff38e3e93:
"""
LTO in gcc 4.6/47. has trouble with global register variables. They were
used to read the stack pointer. Use a simple inline assembler statement
with a mov instead.
This also helps LLVM/clang, which does not support global register
variables.
"""
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Link: http://lkml.kernel.org/r/1394178752-18047-1-git-send-email-minipli@googlemail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rv515.c')
0 files changed, 0 insertions, 0 deletions