[PATCH] res_counter: delete res_counter_write()

[Greg Thelen <gthelen@google.com>]

Since 628f423553 "memcg: limit change shrink usage" both
res_counter_write() and write_strategy_fn have been unused.  This
patch deletes them both.

Signed-off-by: Greg Thelen <gthelen@google.com>
---
 include/linux/res_counter.h |    5 -----
 kernel/res_counter.c        |   22 ----------------------
 2 files changed, 0 insertions(+), 27 deletions(-)

diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index 4b173b6..5ae8456 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h
@@ -74,14 +74,9 @@ ssize_t res_counter_read(struct res_counter *counter, int member,
 		const char __user *buf, size_t nbytes, loff_t *pos,
 		int (*read_strategy)(unsigned long long val, char *s));
 
-typedef int (*write_strategy_fn)(const char *buf, unsigned long long *val);
-
 int res_counter_memparse_write_strategy(const char *buf,
 					unsigned long long *res);
 
-int res_counter_write(struct res_counter *counter, int member,
-		      const char *buffer, write_strategy_fn write_strategy);
-
 /*
  * the field descriptors. one for each member of res_counter
  */
diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index 7b3d6dc..ff55247 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -198,25 +198,3 @@ int res_counter_memparse_write_strategy(const char *buf,
 	*res = PAGE_ALIGN(*res);
 	return 0;
 }
-
-int res_counter_write(struct res_counter *counter, int member,
-		      const char *buf, write_strategy_fn write_strategy)
-{
-	char *end;
-	unsigned long flags;
-	unsigned long long tmp, *val;
-
-	if (write_strategy) {
-		if (write_strategy(buf, &tmp))
-			return -EINVAL;
-	} else {
-		tmp = simple_strtoull(buf, &end, 10);
-		if (*end != '\0')
-			return -EINVAL;
-	}
-	spin_lock_irqsave(&counter->lock, flags);
-	val = res_counter_member(counter, member);
-	*val = tmp;
-	spin_unlock_irqrestore(&counter->lock, flags);
-	return 0;
-}
-- 
1.7.7.3

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