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| author | Emese Revfy | 2010-01-31 20:16:34 +0100 |
|---|---|---|
| committer | H. Peter Anvin | 2010-02-01 20:20:43 +0100 |
| commit | 3b9cfc0a99f88c0db7c72363620584a9b40b4543 (patch) | |
| tree | f34b481d28eae0c04521a36c45bb50c1511cf5e6 /arch/x86/kernel/cpu/mtrr/generic.c | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiw... (diff) | |
| download | kernel-qcow2-linux-3b9cfc0a99f88c0db7c72363620584a9b40b4543.tar.gz kernel-qcow2-linux-3b9cfc0a99f88c0db7c72363620584a9b40b4543.tar.xz kernel-qcow2-linux-3b9cfc0a99f88c0db7c72363620584a9b40b4543.zip | |
x86, mtrr: Constify struct mtrr_ops
This is part of the ops structure constification
effort started by Arjan van de Ven et al.
Benefits of this constification:
* prevents modification of data that is shared
(referenced) by many other structure instances
at runtime
* detects/prevents accidental (but not intentional)
modification attempts on archs that enforce
read-only kernel data at runtime
* potentially better optimized code as the compiler
can assume that the const data cannot be changed
* the compiler/linker move const data into .rodata
and therefore exclude them from false sharing
Signed-off-by: Emese Revfy <re.emese@gmail.com>
LKML-Reference: <4B65D712.3080804@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/cpu/mtrr/generic.c')
| -rw-r--r-- | arch/x86/kernel/cpu/mtrr/generic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c index 55da0c5f68dd..4d755846fee6 100644 --- a/arch/x86/kernel/cpu/mtrr/generic.c +++ b/arch/x86/kernel/cpu/mtrr/generic.c @@ -752,7 +752,7 @@ int positive_have_wrcomb(void) /* * Generic structure... */ -struct mtrr_ops generic_mtrr_ops = { +const struct mtrr_ops generic_mtrr_ops = { .use_intel_if = 1, .set_all = generic_set_all, .get = generic_get_mtrr, |