[PATCH] fs: xfs: Remove unused KM_NOSLEEP, change KM_SLEEP to 0.

[Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>]

Since no caller is using KM_NOSLEEP and no callee branches on KM_SLEEP,
but removing KM_SLEEP requires modification of 97 locations, let's remove
KM_NOSLEEP branch and (for now) change KM_SLEEP to 0.

Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
---
 fs/xfs/kmem.c |  6 +++---
 fs/xfs/kmem.h | 15 +++++----------
 2 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c
index 16bb9a328678..7cd315ad937e 100644
--- a/fs/xfs/kmem.c
+++ b/fs/xfs/kmem.c
@@ -17,7 +17,7 @@ kmem_alloc(size_t size, xfs_km_flags_t flags)
 
 	do {
 		ptr = kmalloc(size, lflags);
-		if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
+		if (ptr || (flags & KM_MAYFAIL))
 			return ptr;
 		if (!(++retries % 100))
 			xfs_err(NULL,
@@ -67,7 +67,7 @@ kmem_realloc(const void *old, size_t newsize, xfs_km_flags_t flags)
 
 	do {
 		ptr = krealloc(old, newsize, lflags);
-		if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
+		if (ptr || (flags & KM_MAYFAIL))
 			return ptr;
 		if (!(++retries % 100))
 			xfs_err(NULL,
@@ -87,7 +87,7 @@ kmem_zone_alloc(kmem_zone_t *zone, xfs_km_flags_t flags)
 
 	do {
 		ptr = kmem_cache_alloc(zone, lflags);
-		if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
+		if (ptr || (flags & KM_MAYFAIL))
 			return ptr;
 		if (!(++retries % 100))
 			xfs_err(NULL,
diff --git a/fs/xfs/kmem.h b/fs/xfs/kmem.h
index 267655acd426..f74a7d6d40dc 100644
--- a/fs/xfs/kmem.h
+++ b/fs/xfs/kmem.h
@@ -16,8 +16,7 @@
  */
 
 typedef unsigned __bitwise xfs_km_flags_t;
-#define KM_SLEEP	((__force xfs_km_flags_t)0x0001u)
-#define KM_NOSLEEP	((__force xfs_km_flags_t)0x0002u)
+#define KM_SLEEP	((__force xfs_km_flags_t)0x0000u)
 #define KM_NOFS		((__force xfs_km_flags_t)0x0004u)
 #define KM_MAYFAIL	((__force xfs_km_flags_t)0x0008u)
 #define KM_ZERO		((__force xfs_km_flags_t)0x0010u)
@@ -32,15 +31,11 @@ kmem_flags_convert(xfs_km_flags_t flags)
 {
 	gfp_t	lflags;
 
-	BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO));
+	BUG_ON(flags & ~(KM_SLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO));
 
-	if (flags & KM_NOSLEEP) {
-		lflags = GFP_ATOMIC | __GFP_NOWARN;
-	} else {
-		lflags = GFP_KERNEL | __GFP_NOWARN;
-		if (flags & KM_NOFS)
-			lflags &= ~__GFP_FS;
-	}
+	lflags = GFP_KERNEL | __GFP_NOWARN;
+	if (flags & KM_NOFS)
+		lflags &= ~__GFP_FS;
 
 	/*
 	 * Default page/slab allocator behavior is to retry for ever
-- 
2.16.5