ppoll: use __kernel_timespec

struct timespec is not y2038 safe.
struct __kernel_timespec is the new y2038 safe structure for all
syscalls that are using struct timespec.
Update ppoll interfaces to use struct __kernel_timespec.

sigset_t also has different representations on 32 bit and 64 bit
architectures. Hence, we need to support the following different
syscalls:

New y2038 safe syscalls:
(Controlled by CONFIG_64BIT_TIME for 32 bit ABIs)

Native 64 bit(unchanged) and native 32 bit : sys_ppoll
Compat : compat_sys_ppoll_time64

Older y2038 unsafe syscalls:
(Controlled by CONFIG_32BIT_COMPAT_TIME for 32 bit ABIs)

Native 32 bit : ppoll_time32
Compat : compat_sys_ppoll

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 2ac3d13a915b..4575ea1f22cd 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -469,7 +469,10 @@ asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,
                              fd_set __user *, struct timespec __user *,
                              void __user *);
 asmlinkage long sys_ppoll(struct pollfd __user *, unsigned int,
-                          struct timespec __user *, const sigset_t __user *,
+                          struct __kernel_timespec __user *, const sigset_t __user *,
+                          size_t);
+asmlinkage long sys_ppoll_time32(struct pollfd __user *, unsigned int,
+                          struct old_timespec32 __user *, const sigset_t __user *,
                           size_t);
 
 /* fs/signalfd.c */