commit 6b14e4198c729b748a7f6d22059e6a101d2b241a
author Chris Metcalf <cmetcalf@tilera.com> Tue Oct 23 13:30:54 2012 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Tue Oct 23 16:23:58 2012 -0400
tree 77668782763f74aec995899e919231e81a71d56a
parent 530550651fdfd548d25b6bd5ff4607803540508b

arch/tile: eliminate pt_regs trampolines for syscalls

Using the new current_pt_regs() model, we can remove some trampolines
from assembly code and call directly to the C syscall implementations.
rt_sigreturn() and clone() still need some assembly wrapping, but no
longer are passed a pt_regs pointer.  sigaltstack() and the
tilepro-specific cmpxchg_badaddr() syscalls are now just straight C.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

arch/tile/kernel/compat.c

diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c
index a8e5a84..a2e8055 100644
--- a/arch/tile/kernel/compat.c
+++ b/arch/tile/kernel/compat.c
@@ -102,9 +102,9 @@
 #define compat_sys_fadvise64_64 sys32_fadvise64_64
 #define compat_sys_readahead sys32_readahead
 
-/* Call the trampolines to manage pt_regs where necessary. */
-#define compat_sys_sigaltstack _compat_sys_sigaltstack
+/* Call the assembly trampolines where necessary. */
 #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
+#undef sys_clone
 #define sys_clone _sys_clone
 
 /*