From d88879b2d0225da3ba460bbdb8361bb049653671 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Wed, 30 Jan 2008 13:31:21 +0100 Subject: [PATCH] x86-64: make pda's cpunumber and nodenumber unsigned This generally allows better code to be generated, since the zero- extension during 32-bit operations comes for free (needed when the result is used as array index or similar), whereas sign extension must be done explicitly and frequently requires a one byte larger instruction due to the necessary rex64 prefix. Signed-off-by: Jan Beulich Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- include/asm-x86/pda.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/asm-x86/pda.h b/include/asm-x86/pda.h index 3d9dd653628a..b620d0c39a93 100644 --- a/include/asm-x86/pda.h +++ b/include/asm-x86/pda.h @@ -15,14 +15,14 @@ struct x8664_pda { unsigned long kernelstack; /* 16 top of kernel stack for current */ unsigned long oldrsp; /* 24 user rsp for system call */ int irqcount; /* 32 Irq nesting counter. Starts with -1 */ - int cpunumber; /* 36 Logical CPU number */ + unsigned int cpunumber; /* 36 Logical CPU number */ #ifdef CONFIG_CC_STACKPROTECTOR unsigned long stack_canary; /* 40 stack canary value */ /* gcc-ABI: this canary MUST be at offset 40!!! */ #endif char *irqstackptr; - int nodenumber; /* number of current node */ + unsigned int nodenumber; /* number of current node */ unsigned int __softirq_pending; unsigned int __nmi_count; /* number of NMI on this CPUs */ short mmu_state; -- 2.30.2