lib/bitmap.c: drop unnecessary 0 check for u32 array operations

nbits == 0 is safe to be supplied to the function body, so remove
unnecessary checks in bitmap_to_arr32() and bitmap_from_arr32().

Link: http://lkml.kernel.org/r/20180531131914.44352-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/bitmap.c b/lib/bitmap.c
index 730969c681cbaf6228e5f8a78bd56e3e547b7122..2fd07f6df0b85e417f340576f530878a9d6ddcfc 100644 (file)
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -1152,14 +1152,10 @@ EXPORT_SYMBOL(bitmap_free);
  *     @buf: array of u32 (in host byte order), the source bitmap
  *     @nbits: number of bits in @bitmap
  */
-void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf,
-                                               unsigned int nbits)
+void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf, unsigned int nbits)
 {
        unsigned int i, halfwords;
 
-       if (!nbits)
-               return;
-
        halfwords = DIV_ROUND_UP(nbits, 32);
        for (i = 0; i < halfwords; i++) {
                bitmap[i/2] = (unsigned long) buf[i];
@@ -1183,9 +1179,6 @@ void bitmap_to_arr32(u32 *buf, const unsigned long *bitmap, unsigned int nbits)
 {
        unsigned int i, halfwords;
 
-       if (!nbits)
-               return;
-
        halfwords = DIV_ROUND_UP(nbits, 32);
        for (i = 0; i < halfwords; i++) {
                buf[i] = (u32) (bitmap[i/2] & UINT_MAX);