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Date:	Sat, 5 Apr 2008 13:48:02 +0200 (CEST)
From:	Geert Uytterhoeven <>
To:	Adrian Bunk <>
cc:	"Aneesh Kumar K.V" <>,,,,,,
Subject: Re: ext4 compile error on m68k

On Sat, 5 Apr 2008, Adrian Bunk wrote:
> Commit aa02ad67d9b308290fde390682cd039b29f7ab85
> "ext4: Add ext4_find_next_bit()" causes the following regression:
> <--  snip  -->
> ...
>   CC [M]  fs/ext4/mballoc.o
> /home/bunk/linux/kernel-2.6/git/linux-2.6/fs/ext4/mballoc.c: In function 'mb_find_next_bit':
> /home/bunk/linux/kernel-2.6/git/linux-2.6/fs/ext4/mballoc.c:696: error: implicit declaration of function 'generic_find_next_le_bit'
> make[3]: *** [fs/ext4/mballoc.o] Error 1
> <--  snip  -->

Known issue. The ext4 developers added a #define (with a different name than in
the patch comment) in the commit below, but forgot to make sure
generic_find_next_le_bit() is actually available.

commit aa02ad67d9b308290fde390682cd039b29f7ab85
Author: Aneesh Kumar K.V <>
Date:   Mon Jan 28 23:58:27 2008 -0500

    ext4: Add ext4_find_next_bit()
    This function is used by the ext4 multi block allocator patches.
    Also add generic_find_next_le_bit
    Signed-off-by: Aneesh Kumar K.V <>
    Cc: <>
    Signed-off-by: Andrew Morton <>

diff --git a/include/asm-m68k/bitops.h b/include/asm-m68k/bitops.h
index 2976b5d..83d1f28 100644
--- a/include/asm-m68k/bitops.h
+++ b/include/asm-m68k/bitops.h
@@ -410,6 +410,8 @@ static inline int ext2_find_next_zero_bit(const void *vaddr
        res = ext2_find_first_zero_bit (p, size - 32 * (p - addr));
        return (p - addr) * 32 + res;
+#define ext2_find_next_bit(addr, size, off) \
+       generic_find_next_le_bit((unsigned long *)(addr), (size), (off))
 #endif /* __KERNEL__ */



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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