[PATCH 7/7] sparc64: mm/gup: add gup trace points

From: Yang Shi
Date: Tue Dec 01 2015 - 18:26:51 EST


Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
Signed-off-by: Yang Shi <yang.shi@xxxxxxxxxx>
---
The context depends on the below patch:
https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/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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