linux-kernel - [PATCH v4 4/7] mips: mm/gup: add gup trace points

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Date:	Wed,  9 Dec 2015 09:29:21 -0800
From:	Yang Shi <yang.shi@...aro.org>
To:	akpm@...ux-foundation.org, rostedt@...dmis.org, mingo@...hat.com
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linaro-kernel@...ts.linaro.org, yang.shi@...aro.org,
	linux-mips@...ux-mips.org
Subject: [PATCH v4 4/7] mips: mm/gup: add gup trace points

Cc: linux-mips@...ux-mips.org
Acked-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Yang Shi <yang.shi@...aro.org>
---
 arch/mips/mm/gup.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index 349995d..e0d8838 100644
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -15,6 +15,9 @@
 #include <asm/cpu-features.h>
 #include <asm/pgtable.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/gup.h>
+
 static inline pte_t gup_get_pte(pte_t *ptep)
 {
 #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
@@ -211,6 +214,8 @@ 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);
+
 	/*
 	 * XXX: batch / limit 'nr', to avoid large irq off latency
 	 * needs some instrumenting to determine the common sizes used by
@@ -291,6 +296,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
 	} while (pgdp++, addr = next, addr != end);
 	local_irq_enable();
 
+	trace_gup_get_user_pages_fast(start, nr_pages);
+
 	VM_BUG_ON(nr != (end - start) >> PAGE_SHIFT);
 	return nr;
 slow:
-- 
2.0.2

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