linux-kernel - Re: Yet more ARM breakage in linux-next

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Message-Id: <200812041245.24568.rusty@rustcorp.com.au>
Date:	Thu, 4 Dec 2008 12:45:24 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Mike Frysinger" <vapier.adi@...il.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Russell King" <rmk+lkml@....linux.org.uk>,
	linux-kernel@...r.kernel.org,
	"Stephen Rothwell" <sfr@...b.auug.org.au>
Subject: Re: Yet more ARM breakage in linux-next

On Thursday 04 December 2008 12:03:57 Mike Frysinger wrote:
> On Wed, Dec 3, 2008 at 18:22, Rusty Russell wrote:
> > On Thursday 04 December 2008 07:11:09 Andrew Morton wrote:
> >> On Wed, 3 Dec 2008 19:29:05 +0000
> >>
> >> Russell King <rmk+lkml@....linux.org.uk> wrote:
> >> > This seems to be causing lots of ARM breakage:
> >> >
> >> > lib/find_next_bit.c:183: error: implicit declaration of function
> >> > '__fls'
> >> >
> >> > Whoever's responsible,
> >>
> >> git-blame?
> >
> > It's me.  Turns out sparc, avr32 and arm all don't define __fls in their
> > asm/bitops.h, and I'm the first one to use it in generic code.
>
> the Blackfin port also does not ... you going to post a change for
> that since the build breaks for Blackfin atm too ?
> -mike

Sure, why not join the party!

(Hmm, maybe I should change that list to a shorter list of archs which
*do* define __fls?)

blackfin: define __fls

Like fls, but can't be handed 0 and returns the bit number.

(I broke this arch in linux-next by using __fls in generic code).

Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>

diff --git a/arch/blackfin/include/asm/bitops.h b/arch/blackfin/include/asm/bitops.h
--- a/arch/blackfin/include/asm/bitops.h
+++ b/arch/blackfin/include/asm/bitops.h
@@ -213,6 +213,7 @@ static __inline__ int __test_bit(int nr,
 #endif				/* __KERNEL__ */
 
 #include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/__fls.h>
 #include <asm-generic/bitops/fls64.h>
 
 #endif				/* _BLACKFIN_BITOPS_H */

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