linux-kernel - Re: [2.6 patch] blackfin: "extern inline" -> "static inline"

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Date:	Wed, 24 Oct 2007 23:17:38 -0400
From:	"Mike Frysinger" <vapier.adi@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"Jie Zhang" <jzhang.linux@...il.com>,
	"Adrian Bunk" <bunk@...nel.org>, bryan.wu@...log.com,
	linux-kernel@...r.kernel.org
Subject: Re: [2.6 patch] blackfin: "extern inline" -> "static inline"

On 10/24/07, H. Peter Anvin <hpa@...or.com> wrote:
> Mike Frysinger wrote:
> > On 10/24/07, Jie Zhang <jzhang.linux@...il.com> wrote:
> >> On 10/25/07, Adrian Bunk <bunk@...nel.org> wrote:
> >>> "extern inline" will have different semantics with gcc 4.3.
> >>>
> >>> Signed-off-by: Adrian Bunk <bunk@...nel.org>
> >>>
> >>> --- a/include/asm-blackfin/string.h
> >>> +++ b/include/asm-blackfin/string.h
> >>> @@ -4,7 +4,7 @@
> >>>  #ifdef __KERNEL__              /* only set these up for kernel code */
> >>>
> >>>  #define __HAVE_ARCH_STRCPY
> >>> -extern inline char *strcpy(char *dest, const char *src)
> >>> +static inline char *strcpy(char *dest, const char *src)
> >>>  {
> >>>         char *xdest = dest;
> >>>         char temp = 0;
> >> What if we compile it with gcc 4.1?
> >
> > we'll have to either use the gcc attributes to force old inline
> > behavior or use the gcc flag to force it
>
> We should probably have an extern_inline define then, assuming this is a
> function that does exist in a linkable version already -- otherwise
> "static inline" is correct.

right, we do have string versions in arch/blackfin/lib/ and we do want
the "classical" gcc behavior here with "extern static".  an
extern_inline macro in compiler.h sounds good since
__attribute__((__gnu_inline__)) doesnt exist in gcc-3.4.x (the other
version that works for Blackfin other than gcc-4.1.x).

so i guess NACK this patch since we dont want "static inline" and we
dont yet support gcc-4.3 on Blackfin.
-mike
-
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