treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks

Don't emit OOM warnings when k.alloc calls fail when
there there is a v.alloc immediately afterwards.

Converted a kmalloc/vmalloc with memset to kzalloc/vzalloc.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/scsi/cxgbi/libcxgbi.h

@@ -658,11 +658,11 @@ static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat,
 static inline void *cxgbi_alloc_big_mem(unsigned int size,
 					gfp_t gfp)
 {
-	void *p = kmalloc(size, gfp);
+	void *p = kzalloc(size, gfp | __GFP_NOWARN);
+
 	if (!p)
-		p = vmalloc(size);
-	if (p)
-		memset(p, 0, size);
+		p = vzalloc(size);
+
 	return p;
 }