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    Subject[tip:x86/mm] x86/pat: Trivial: don't create debugfs for memtype if pat is disabled
    Commit-ID:  dd4377b02d9f028006beed1b7b1695ee5d1498b6
    Gitweb: http://git.kernel.org/tip/dd4377b02d9f028006beed1b7b1695ee5d1498b6
    Author: Xiaotian Feng <dfeng@redhat.com>
    AuthorDate: Thu, 26 Nov 2009 19:53:48 +0800
    Committer: Ingo Molnar <mingo@elte.hu>
    CommitDate: Thu, 26 Nov 2009 15:05:03 +0100

    x86/pat: Trivial: don't create debugfs for memtype if pat is disabled

    If pat is disabled (boot with nopat), there's no need to create
    debugfs for it, it's empty all the time.

    Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
    Cc: Suresh Siddha <suresh.b.siddha@intel.com>
    Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    LKML-Reference: <1259236428-16329-1-git-send-email-dfeng@redhat.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    ---
    arch/x86/mm/pat.c | 6 ++++--
    1 files changed, 4 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
    index ef71251..a81b7e7 100644
    --- a/arch/x86/mm/pat.c
    +++ b/arch/x86/mm/pat.c
    @@ -1019,8 +1019,10 @@ static const struct file_operations memtype_fops = {

    static int __init pat_memtype_list_init(void)
    {
    - debugfs_create_file("pat_memtype_list", S_IRUSR, arch_debugfs_dir,
    - NULL, &memtype_fops);
    + if (pat_enabled) {
    + debugfs_create_file("pat_memtype_list", S_IRUSR,
    + arch_debugfs_dir, NULL, &memtype_fops);
    + }
    return 0;
    }


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