m68knommu: fix build error due to the lack of find_next_bit_le()

m68knommu can't build ext4, udf, and ocfs2 due to the lack of
find_next_bit_le().

This implements find_next_bit_le() on m68knommu by duplicating the generic
find_next_bit_le() in lib/find_next_bit.c.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/bitops_no.h b/arch/m68k/include/asm/bitops_no.h
index 6b0e2d349f0e..b816299816ad 100644
--- a/arch/m68k/include/asm/bitops_no.h
+++ b/arch/m68k/include/asm/bitops_no.h
@@ -320,6 +320,50 @@ found_middle:
         return result + ffz(__swab32(tmp));
 }
 
+static inline unsigned long find_next_bit_le(const void *addr, unsigned
+                long size, unsigned long offset)
+{
+        const unsigned long *p = addr;
+        unsigned long result = offset & ~(BITS_PER_LONG - 1);
+        unsigned long tmp;
+
+        if (offset >= size)
+                return size;
+        p += offset / BITS_PER_LONG;
+        size -= result;
+        offset &= (BITS_PER_LONG - 1UL);
+        if (offset) {
+                tmp = __swab32(*(p++));
+                tmp &= (~0UL << offset);
+                if (size < BITS_PER_LONG)
+                        goto found_first;
+                if (tmp)
+                        goto found_middle;
+                size -= BITS_PER_LONG;
+                result += BITS_PER_LONG;
+        }
+
+        while (size & ~(BITS_PER_LONG - 1)) {
+                tmp = *(p++);
+                if (tmp)
+                        goto found_middle_swap;
+                result += BITS_PER_LONG;
+                size -= BITS_PER_LONG;
+        }
+        if (!size)
+                return result;
+        tmp = __swab32(*p);
+found_first:
+        tmp &= (~0UL >> (BITS_PER_LONG - size));
+        if (tmp == 0UL)         /* Are any bits set? */
+                return result + size; /* Nope. */
+found_middle:
+        return result + __ffs(tmp);
+
+found_middle_swap:
+        return result + __ffs(__swab32(tmp));
+}
+
 #endif /* __KERNEL__ */
 
 #include <asm-generic/bitops/fls.h>