linux-kernel - [PATCH] PM: fix suspend_set

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Date:	Wed,  5 Jan 2011 16:22:53 -0800
From:	Kevin Hilman <khilman@...com>
To:	linux-pm@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] PM: fix suspend_set_ops() to take const pointer

checkpatch warns that pointers for certain structs should be const,
and platform_suspend_ops is one of those structs.  If you follow this
suggestion you trade a checkpatch warning for a compiler warning of
the form:

   warning: passing argument 1 of 'suspend_set_ops' discards qualifiers from pointer target type

Fix suspend_set_ops() to take a const pointer so everyone expects
const.

Signed-off-by: Kevin Hilman <khilman@...com>
---
Applies to v2.6.37, but also applies cleanly to suspend-2.6/linux-next

 include/linux/suspend.h |    4 ++--
 kernel/power/suspend.c  |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 2669751..bb98383 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -122,7 +122,7 @@ struct platform_suspend_ops {
  * suspend_set_ops - set platform dependent suspend operations
  * @ops: The new suspend operations to set.
  */
-extern void suspend_set_ops(struct platform_suspend_ops *ops);
+extern void suspend_set_ops(const struct platform_suspend_ops *ops);
 extern int suspend_valid_only_mem(suspend_state_t state);
 
 /**
@@ -147,7 +147,7 @@ extern int pm_suspend(suspend_state_t state);
 #else /* !CONFIG_SUSPEND */
 #define suspend_valid_only_mem	NULL
 
-static inline void suspend_set_ops(struct platform_suspend_ops *ops) {}
+static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
 #endif /* !CONFIG_SUSPEND */
 
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index ecf7705..0c0af3d 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -36,7 +36,7 @@ static struct platform_suspend_ops *suspend_ops;
  *	suspend_set_ops - Set the global suspend method table.
  *	@ops:	Pointer to ops structure.
  */
-void suspend_set_ops(struct platform_suspend_ops *ops)
+void suspend_set_ops(const struct platform_suspend_ops *ops)
 {
 	mutex_lock(&pm_mutex);
 	suspend_ops = ops;
-- 
1.7.3.4

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