Messages in this thread | | | Date | Sat, 22 Mar 2014 17:21:47 +0100 | From | Sam Ravnborg <> | Subject | Re: [PATCH v2] LLVMLinux: Remove warning about returning an uninitialized variable |
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On Sat, Mar 22, 2014 at 08:48:19AM -0700, behanw@converseincode.com wrote: > From: Behan Webster <behanw@converseincode.com> > > Fix uninitialized return code in default case in cmpxchg-local.h > > This patch fixes the code to prevent an uninitialized return value that is detected > when compiling with clang. The bug produces numerous warnings when compiling the > Linux kernel with clang. > > Signed-off-by: Behan Webster <behanw@converseincode.com> > Signed-off-by: Mark Charlebois <charlebm@gmail.com> > --- > include/asm-generic/cmpxchg-local.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/asm-generic/cmpxchg-local.h b/include/asm-generic/cmpxchg-local.h > index d8d4c89..9112111 100644 > --- a/include/asm-generic/cmpxchg-local.h > +++ b/include/asm-generic/cmpxchg-local.h > @@ -41,6 +41,7 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr, > break; > default: > wrong_size_cmpxchg(ptr); > + __builtin_unreachable();
It is unreachable() - see compiler.h
Sam
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