Conversion for sys_futex is particularly easy, we can use the unmodified
compat_sys_futex on 32-bit systems to provide compatibility for 32-bit
time_t, and change sys_futex to pass a __kernel_timespec, which matches
what future libc implementations will use as their struct timespec.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
include/linux/syscalls.h | 4 ++--
kernel/futex.c | 10 +++++-----
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 017aa1c970e6..90c3cd889387 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -331,8 +331,8 @@ asmlinkage long sys_waitid(int which, pid_t pid,
asmlinkage long sys_waitpid(pid_t pid, int __user *stat_addr, int options);
asmlinkage long sys_set_tid_address(int __user *tidptr);
asmlinkage long sys_futex(u32 __user *uaddr, int op, u32 val,
- struct timespec __user *utime, u32 __user *uaddr2,
- u32 val3);
+ struct __kernel_timespec __user *utime,
+ u32 __user *uaddr2, u32 val3);
asmlinkage long sys_init_module(void __user *umod, unsigned long len,
const char __user *uargs);
diff --git a/kernel/futex.c b/kernel/futex.c
index 2579e407ff67..199e4f94a80c 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -2970,10 +2970,10 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val,
- struct timespec __user *, utime, u32 __user *, uaddr2,
+ struct __kernel_timespec __user *, utime, u32 __user *, uaddr2,
u32, val3)
{
- struct timespec ts;
+ struct timespec64 ts;
ktime_t t, *tp = NULL;
u32 val2 = 0;
int cmd = op & FUTEX_CMD_MASK;
@@ -2981,12 +2981,12 @@ SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val,
if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI ||
cmd == FUTEX_WAIT_BITSET ||
cmd == FUTEX_WAIT_REQUEUE_PI)) {
- if (copy_from_user(&ts, utime, sizeof(ts)) != 0)
+ if (get_timespec64(&ts, utime))
return -EFAULT;
- if (!timespec_valid(&ts))
+ if (!timespec64_valid(&ts))
return -EINVAL;
- t = timespec_to_ktime(ts);
+ t = timespec64_to_ktime(ts);
if (cmd == FUTEX_WAIT)
t = ktime_add_safe(ktime_get(), t);
tp = &t;
--
2.1.0.rc2
--
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