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    Subject[PATCH V2 7/7] sparc64: mm/gup: add gup trace points
    Date
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: sparclinux@vger.kernel.org
    Signed-off-by: Yang Shi <yang.shi@linaro.org>
    ---
    The context depends on the below patch:
    https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1028752.html

    arch/sparc/mm/gup.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c
    index cf4fb47..6dcfc4d 100644
    --- a/arch/sparc/mm/gup.c
    +++ b/arch/sparc/mm/gup.c
    @@ -10,6 +10,10 @@
    #include <linux/vmstat.h>
    #include <linux/pagemap.h>
    #include <linux/rwsem.h>
    +
    +#define CREATE_TRACE_POINTS
    +#include <trace/events/gup.h>
    +
    #include <asm/pgtable.h>

    /*
    @@ -177,6 +181,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
    (void __user *)start, len)))
    return 0;

    + trace_gup_get_user_pages_fast(start, nr_pages, write, pages);
    +
    local_irq_save(flags);
    pgdp = pgd_offset(mm, addr);
    do {
    @@ -209,6 +215,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
    if (end < start)
    goto slow_irqon;

    + trace_gup_get_user_pages_fast(start, nr_pages, write, pages);
    +
    /*
    * XXX: batch / limit 'nr', to avoid large irq off latency
    * needs some instrumenting to determine the common sizes used by
    --
    2.0.2


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