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| author | Alexander Kuleshov <kuleshovmail@gmail.com> | 2016-11-28 13:50:57 +0600 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-02-04 09:36:59 +0100 |
| commit | 07d495dae20717b00881798ef812f7aa53ca0eb3 (patch) | |
| tree | 1971fa9711049b5f90653cfc9fc940722466f50f /tools/arch/x86/include/asm/cpufeatures.h | |
| parent | 68dee8e2f2cacc54d038394e70d22411dee89da2 (diff) | |
| download | talos-obmc-linux-07d495dae20717b00881798ef812f7aa53ca0eb3.tar.gz talos-obmc-linux-07d495dae20717b00881798ef812f7aa53ca0eb3.zip | |
x86/traps: Get rid of unnecessary preempt_disable/preempt_enable_no_resched
Exception handlers which may run on IST stack call ist_enter() at the start
of execution and ist_exit() in the end. ist_enter() disables preemption
unconditionally and ist_exit() enables it.
So the extra preempt_disable/enable() pairs nested inside the
ist_enter/exit() regions are pointless and can be removed.
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Jianyu Zhan <nasa4836@gmail.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20161128075057.7724-1-kuleshovmail@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'tools/arch/x86/include/asm/cpufeatures.h')
0 files changed, 0 insertions, 0 deletions
