Commit-ID: 2bf557ea3f49576fabe24cd5daf1a34e9ee22c3c Gitweb: http://git.kernel.org/tip/2bf557ea3f49576fabe24cd5daf1a34e9ee22c3c Author: Jan Beulich <jbeul...@suse.com> AuthorDate: Mon, 1 Jun 2015 13:02:55 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 2 Jun 2015 10:10:09 +0200
x86/asm/entry/64: Use negative immediates for stack adjustments Doing so allows adjustments by 128 bytes (occurring for REMOVE_PT_GPREGS_FROM_STACK 8 uses) to be expressed with a single byte immediate. Signed-off-by: Jan Beulich <jbeul...@suse.com> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.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/556c660f020000780007f...@mail.emea.novell.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/calling.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h index 0d76acc..f4e6308 100644 --- a/arch/x86/include/asm/calling.h +++ b/arch/x86/include/asm/calling.h @@ -89,7 +89,7 @@ For 32-bit we have the following conventions - kernel is built with #define SIZEOF_PTREGS 21*8 .macro ALLOC_PT_GPREGS_ON_STACK addskip=0 - subq $15*8+\addskip, %rsp + addq $-(15*8+\addskip), %rsp .endm .macro SAVE_C_REGS_HELPER offset=0 rax=1 rcx=1 r8910=1 r11=1 @@ -201,7 +201,7 @@ For 32-bit we have the following conventions - kernel is built with .endm .macro REMOVE_PT_GPREGS_FROM_STACK addskip=0 - addq $15*8+\addskip, %rsp + subq $-(15*8+\addskip), %rsp .endm .macro icebp -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
