Commit-ID: 1e4c4f610f774df6088d7c065b2dd4d22adba698 Gitweb: https://git.kernel.org/tip/1e4c4f610f774df6088d7c065b2dd4d22adba698 Author: Borislav Petkov <[email protected]> AuthorDate: Thu, 2 Nov 2017 13:09:26 +0100 Committer: Ingo Molnar <[email protected]> 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 <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- 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:
