lkml.org 
[lkml]   [2007]   [Nov]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    SubjectRe: [patch 05/10] x86_64: Use generic percpu

    had rejects - hand-merged to x86.git - please check.

    Ingo

    ---------------->
    Subject: x86_64: Use generic percpu
    From: Christoph Lameter <clameter@sgi.com>

    x86_64 provides an optimized way to determine the local per cpu area
    offset through the pda and determines the base by accessing a remote
    pda.

    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Andi Kleen <ak@suse.de>
    Signed-off-by: Christoph Lameter <clameter@sgi.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    include/asm-x86/percpu_64.h | 28 +++-------------------------
    1 file changed, 3 insertions(+), 25 deletions(-)

    Index: linux-x86.q/include/asm-x86/percpu_64.h
    ===================================================================
    --- linux-x86.q.orig/include/asm-x86/percpu_64.h
    +++ linux-x86.q/include/asm-x86/percpu_64.h
    @@ -8,25 +8,13 @@
    from %gs */

    #ifdef CONFIG_SMP
    -
    #include <asm/pda.h>

    #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
    -#define __my_cpu_offset() read_pda(data_offset)
    +#define __my_cpu_offset read_pda(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) (*({ \
    - extern int simple_identifier_##var(void); \
    - RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)); }))
    -#define __get_cpu_var(var) (*({ \
    - extern int simple_identifier_##var(void); \
    - RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))
    -#define __raw_get_cpu_var(var) (*({ \
    - extern int simple_identifier_##var(void); \
    - RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))
    -
    /* A macro to avoid #include hell... */
    #define percpu_modcopy(pcpudst, src, size) \
    do { \
    @@ -36,16 +24,6 @@ do { \
    (src), (size)); \
    } while (0)

    -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
    -
    +#endif
    +#include <asm-generic/percpu.h>
    #endif /* _ASM_X8664_PERCPU_H_ */
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/
    \
     
     \ /
      Last update: 2007-11-30 12:15    [W:0.026 / U:1.004 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site