We are currently embedding the same check from thread_info.h into
syscall.h thanks to the way syscall_get_arch() was implemented in the
audit tree.  Instead create a new function, is_32bit_task() which is
similar to that found on the powerpc arch.  This simplifies the
syscall.h code and makes the build/Kconfig requirements much easier
to understand.

Signed-off-by: Eric Paris <eparis@redhat.com
Acked-by: NDavid S. Miller <davem@davemloft.net>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: sparclinux@vger.kernel.org

After merging the audit tree, today's linux-next build (sparc defconfig)
failed like this:

In file included from include/linux/audit.h:29:0,
                 from mm/mmap.c:33:
arch/sparc/include/asm/syscall.h: In function 'syscall_get_arch':
arch/sparc/include/asm/syscall.h:131:9: error: 'TIF_32BIT' undeclared (first use in this function)
arch/sparc/include/asm/syscall.h:131:9: note: each undeclared identifier is reported only once for each function it appears in

And many more ...

Caused by commit 374c0c054122 ("ARCH: AUDIT: implement syscall_get_arch
for all arches").

This patch wraps the usage of TIF_32BIT in:
   if defined(__sparc__) && defined(__arch64__)
Which solves the build problem.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NRichard Guy Briggs <rgb@redhat.com>
Signed-off-by: NEric Paris <eparis@redhat.com>

For all arches which support audit implement syscall_get_arch()
They are all pretty easy and straight forward, stolen from how the call
to audit_syscall_entry() determines the arch.
Based-on-patch-by: NRichard Briggs <rgb@redhat.com>
Signed-off-by: NEric Paris <eparis@redhat.com>
Cc: linux-ia64@vger.kernel.org
Cc: microblaze-uclinux@itee.uq.edu.au
Cc: linux-mips@linux-mips.org
Cc: linux@lists.openrisc.net
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: sparclinux@vger.kernel.org

Most implementations of arch_syscall_addr() are the same, so create a
default version in common code and move the one piece that differs (the
syscall table) to asm/syscall.h.  New arch ports don't have to waste
time copying & pasting this simple function.

The s390/sparc versions need to be different, so document why.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Acked-by: NPaul Mundt <lethal@linux-sh.org>
Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1264498803-17278-1-git-send-email-vapier@gentoo.org>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>

Based upon a patch by Roland McGrath.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>