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    Contents of /tags/kernel26-xen-2_6_25_r1-fedora9-patches/kernel26-xen/patches-2.6.25-r1/1044-2.6.25-xen-x86_64-percpu-assembly-macros.patch

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    Revision 608 - (show annotations) (download)
    Fri May 23 12:17:32 2008 UTC (16 years ago) by (unknown author)
    File size: 1260 byte(s) 
    This commit was manufactured by cvs2svn to create tag
'kernel26-xen-2_6_25_r1-fedora9-patches'.
    1 From 99a35b361b4efabf50337f9f2a9e548c50e566cb Mon Sep 17 00:00:00 2001
    2 From: Eduardo Habkost <ehabkost@redhat.com>
    3 Date: Thu, 29 Nov 2007 16:05:08 -0200
    4 Subject: [PATCH] x86_64 percpu assembly macros
    5
    6 Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
    7 ---
    8 include/asm-x86/percpu.h | 26 +++++++++++++++++++++++++-
    9 1 files changed, 25 insertions(+), 1 deletions(-)
    10
    11 diff --git a/include/asm-x86/percpu.h b/include/asm-x86/percpu.h
    12 index 5dcb3bd..3f4522b 100644
    13 --- a/include/asm-x86/percpu.h
    14 +++ b/include/asm-x86/percpu.h
    15 @@ -9,7 +9,31 @@
    16 should be just put into a single section and referenced directly
    17 from %gs */
    18
    19 -#ifndef __ASSEMBLY__
    20 +#ifdef __ASSEMBLY__
    21 +
    22 +/*
    23 + * PER_CPU finds an address of a per-cpu variable.
    24 + *
    25 + * Args:
    26 + * var - variable name
    27 + * reg - 32bit register
    28 + *
    29 + * The resulting address is stored in the "reg" argument.
    30 + *
    31 + * Example:
    32 + * PER_CPU(cpu_gdt_descr, %ebx)
    33 + */
    34 +#ifdef CONFIG_SMP
    35 +#define PER_CPU(var, reg) \
    36 + movq %gs:pda_data_offset, reg; \
    37 + lea per_cpu__##var(reg), reg
    38 +#else /* ! SMP */
    39 +#define PER_CPU(var, reg) \
    40 + movl $per_cpu__##var, reg
    41 +#define PER_CPU_VAR(var) per_cpu__##var
    42 +#endif /* SMP */
    43 +
    44 +#else /* ...!ASSEMBLY */
    45
    46 #ifdef CONFIG_SMP
    47 #include <asm/pda.h>
    48 --
    49 1.5.4.1
    50