Commit-ID: 1e4c4f610f774df6088d7c065b2dd4d22adba698 Gitweb: https://git.kernel.org/tip/1e4c4f610f774df6088d7c065b2dd4d22adba698 Author: Borislav Petkov <b...@suse.de> AuthorDate: Thu, 2 Nov 2017 13:09:26 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 2 Nov 2017 13:45:37 +0100
x86/entry/64: Shorten TEST instructions Convert TESTL to TESTB and save 3 bytes per callsite. No functionality change. Signed-off-by: Borislav Petkov <b...@suse.de> Cc: Andy Lutomirski <l...@kernel.org> Cc: Brian Gerst <brge...@gmail.com> Cc: Dave Hansen <dave.han...@intel.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/20171102120926.4srwerqrr7g72...@pd.tnic Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/entry/entry_64.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 40e9933..84263c7 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -620,7 +620,7 @@ GLOBAL(retint_user) GLOBAL(swapgs_restore_regs_and_return_to_usermode) #ifdef CONFIG_DEBUG_ENTRY /* Assert that pt_regs indicates user mode. */ - testl $3, CS(%rsp) + testb $3, CS(%rsp) jnz 1f ud2 1: @@ -653,7 +653,7 @@ retint_kernel: GLOBAL(restore_regs_and_return_to_kernel) #ifdef CONFIG_DEBUG_ENTRY /* Assert that pt_regs indicates kernel mode. */ - testl $3, CS(%rsp) + testb $3, CS(%rsp) jz 1f ud2 1:
