x86/entry/64: Move SWAPGS into the common IRET-to-usermode path

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commit 8a055d7f41 upstream.

All of the code paths that ended up doing IRET to usermode did
SWAPGS immediately beforehand.  Move the SWAPGS into the common
code.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/27fd6f45b7cd640de38fb9066fd0349bcd11f8e1.1509609304.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Andy Lutomirski 2017-11-02 00:59:00 -07:00 • committed by Greg Kroah-Hartman

parent 65236abc42

commit 7d4bb32bc6

2 changed files with 15 additions and 20 deletions

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32

arch/x86/entry/entry_64.S

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3

arch/x86/entry/entry_64_compat.S

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