POWERPC: use generic per cpu (56f90205) · Commits · 戴 / test

Powerpc has a way to determine the address of the per cpu area of the currently executing processor via the paca and the array of per cpu offsets is avoided by looking up the per cpu area from the remote paca's (copying x86_64). Cc: Paul Mackerras <paulus@samba.org> Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by:

Mike Travis <travis@sgi.com> Signed-off-by:

Ingo Molnar <mingo@elte.hu> Acked-by:

Olof Johansson <olof@lixom.net> Tested-by:

Geoff Levand <geoffrey.levand@am.sony.com>

include/asm-powerpc/percpu.h

+3 −19

Original line number	Diff line number	Diff line
		@@ -13,28 +13,12 @@
		#include <asm/paca.h>

		#define __per_cpu_offset(cpu) (paca[cpu].data_offset)
		#define __my_cpu_offset() get_paca()->data_offset
		#define __my_cpu_offset get_paca()->data_offset
		#define per_cpu_offset(x) (__per_cpu_offset(x))

		/* var is in discarded region: offset to particular copy we want */
		#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
		#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
		#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, local_paca->data_offset))
		#endif /* CONFIG_SMP */
		#endif /* __powerpc64__ */

		extern void setup_per_cpu_areas(void);

		#else /* ! SMP */

		#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
		#define __get_cpu_var(var) per_cpu__##var
		#define __raw_get_cpu_var(var) per_cpu__##var

		#endif /* SMP */

		#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name

		#else
		#include <asm-generic/percpu.h>
		#endif

		#endif /* _ASM_POWERPC_PERCPU_H_ */

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