signal/parisc: Remove parisc specific definition of __ARCH_UAPI_SA_FLAGS

Randy Dunlap wrote:
> On 11/27/20 10:43 AM, Randy Dunlap wrote:
>
> > on parisc, _SA_SIGGFAULT is undefined and causing build errors.
> >
> > commit 23acdc76f1
> > Author: Peter Collingbourne <pcc@google.com>
> > Date:   Thu Nov 12 18:53:34 2020 -0800
> >
> >     signal: clear non-uapi flag bits when passing/returning sa_flags
> >
> >
> >
> > _SA_SIGGFAULT is not used or defined anywhere else in the
> > kernel source tree.
>
>
> Here is the build error (although it should be obvious):
>
> ../kernel/signal.c: In function 'do_sigaction':
> ../arch/parisc/include/asm/signal.h:24:30: error: '_SA_SIGGFAULT' undeclared (first use in this function)
>    24 | #define __ARCH_UAPI_SA_FLAGS _SA_SIGGFAULT
>       |                              ^~~~~~~~~~~~~

Stephen Rothwell pointed out:
> _SA_SIGGFAULT was removed by commit
>
>   41f5a81c07 ("parisc: Drop HP-UX specific fcntl and signal flags")
>
> which was added to Linus' tree in v5.10-rc1.

Solve this by removing the the parisc specific definition of
__ARCH_UAPI_SA_FLAGS that was just added.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Fixes: 23acdc76f1 ("signal: clear non-uapi flag bits when passing/returning sa_flags")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

arch/parisc/include/asm/signal.h

@@ -21,8 +21,6 @@ typedef struct {
 	unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-#define __ARCH_UAPI_SA_FLAGS	_SA_SIGGFAULT
-
 #include <asm/sigcontext.h>
 
 #endif /* !__ASSEMBLY */