linux-kernel - [PATCH] PM: Fix signed/unsigned warning

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Date:	Mon, 20 Sep 2010 11:33:32 -0700
From:	Kevin Cernekee <cernekee@...il.com>
To:	Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>
Cc:	<linux-pm@...ts.linux-foundation.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] PM: Fix signed/unsigned warning

Seen on MIPS32, gcc 4.4.3, 2.6.36-rc4:

drivers/base/power/main.c: In function 'dpm_show_time':
drivers/base/power/main.c:415: warning: comparison of distinct pointer types lacks a cast

do_div() takes unsigned parameters:

uint32_t do_div(uint64_t *n, uint32_t base);

Using an unsigned variable for usecs64 should not cause any problems,
because calltime >= starttime .

Signed-off-by: Kevin Cernekee <cernekee@...il.com>
---
 drivers/base/power/main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 276d5a7..db67719 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -407,7 +407,7 @@ static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
 static void dpm_show_time(ktime_t starttime, pm_message_t state, char *info)
 {
 	ktime_t calltime;
-	s64 usecs64;
+	u64 usecs64;
 	int usecs;
 
 	calltime = ktime_get();
-- 
1.7.0.4

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