Messages in this thread | | | Date | Tue, 12 Mar 2013 13:35:48 +0100 | From | Jonas Bonn <> | Subject | Re: [PATCH 1/1] asm-generic: move cmpxchg*_local defs to cmpxchg.h |
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Hi Arnd,
Can you comment on this patch? This is needed so that the generic asm/cmpxchg.h can be used standalone (i.e. without pulling in atomic.h). OpenRISC uses the generic asm/cmpxchg.h and things currently don't build without this since linux/llist.h now includes asm/cmpxchg.h standalone.
Thanks, Jonas
On 02/28/2013 06:54 AM, Jonas Bonn wrote: > asm/cmpxchg.h can be included on its own and needs to be self-consistent. > The definitions for the cmpxchg*_local macros, as such, need to be part > of this file. > > This fixes a build issue on OpenRISC since the system.h smashing patch > 96f951edb1f1bdbbc99b0cd458f9808bb83d58ae that introdued the direct inclusion > asm/cmpxchg.h into linux/llist.h. > > CC: David Howells <dhowells@redhat.com> > Signed-off-by: Jonas Bonn <jonas@southpole.se> > --- > include/asm-generic/atomic.h | 6 ------ > include/asm-generic/cmpxchg.h | 10 ++++++++++ > 2 files changed, 10 insertions(+), 6 deletions(-) > > diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h > index 1ced641..33bd2de 100644 > --- a/include/asm-generic/atomic.h > +++ b/include/asm-generic/atomic.h > @@ -136,12 +136,6 @@ static inline void atomic_dec(atomic_t *v) > #define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) > #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) > > -#define cmpxchg_local(ptr, o, n) \ > - ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ > - (unsigned long)(n), sizeof(*(ptr)))) > - > -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) > - > static inline int __atomic_add_unless(atomic_t *v, int a, int u) > { > int c, old; > diff --git a/include/asm-generic/cmpxchg.h b/include/asm-generic/cmpxchg.h > index 1488302..811fb1e 100644 > --- a/include/asm-generic/cmpxchg.h > +++ b/include/asm-generic/cmpxchg.h > @@ -92,6 +92,16 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) > */ > #include <asm-generic/cmpxchg-local.h> > > +#ifndef cmpxchg_local > +#define cmpxchg_local(ptr, o, n) \ > + ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ > + (unsigned long)(n), sizeof(*(ptr)))) > +#endif > + > +#ifndef cmpxchg64_local > +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) > +#endif > + > #define cmpxchg(ptr, o, n) cmpxchg_local((ptr), (o), (n)) > #define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n)) > >
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