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Message-Id: <1303910411-15793-2-git-send-email-akinobu.mita@gmail.com>
Date: Wed, 27 Apr 2011 22:20:05 +0900
From: Akinobu Mita <akinobu.mita@...il.com>
To: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
akpm@...ux-foundation.org, arnd@...db.de
Cc: Akinobu Mita <akinobu.mita@...il.com>,
Greg Ungerer <gerg@...inux.org>
Subject: [PATCH v3 1/7] 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@...il.com>
Cc: Greg Ungerer <gerg@...inux.org>
---
This patch should go into 2.6.39
arch/m68k/include/asm/bitops_no.h | 44 +++++++++++++++++++++++++++++++++++++
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 7d3779f..97d1d0c 100644
--- a/arch/m68k/include/asm/bitops_no.h
+++ b/arch/m68k/include/asm/bitops_no.h
@@ -336,6 +336,50 @@ 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>
--
1.7.4.4
--
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