Merge branch 'master' into csb1725

[mv-sheeva.git] / drivers / mtd / ubi / misc.c

diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c
index 22ad314029452935dfffff32165d49047da2603d..ff2a65c37f69a6c12e7dbbdafb0c8367e951ce49 100644 (file)
--- a/drivers/mtd/ubi/misc.c
+++ b/drivers/mtd/ubi/misc.c
@@ -103,3 +103,22 @@ void ubi_calculate_reserved(struct ubi_device *ubi)
        if (ubi->beb_rsvd_level < MIN_RESEVED_PEBS)
                ubi->beb_rsvd_level = MIN_RESEVED_PEBS;
 }
+
+/**
+ * ubi_check_pattern - check if buffer contains only a certain byte pattern.
+ * @buf: buffer to check
+ * @patt: the pattern to check
+ * @size: buffer size in bytes
+ *
+ * This function returns %1 in there are only @patt bytes in @buf, and %0 if
+ * something else was also found.
+ */
+int ubi_check_pattern(const void *buf, uint8_t patt, int size)
+{
+       int i;
+
+       for (i = 0; i < size; i++)
+               if (((const uint8_t *)buf)[i] != patt)
+                       return 0;
+       return 1;
+}