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Commit d88879b2 authored by Jan Beulich's avatar Jan Beulich Committed by Ingo Molnar
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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: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent bdb4f156

include/asm-x86/pda.h

+2 −2
Original line number Diff line number Diff line
@@ -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;