diff options
| -rw-r--r-- | fs/select.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/fs/select.c b/fs/select.c index e2fd58f8f1db..7dede89658f5 100644 --- a/fs/select.c +++ b/fs/select.c @@ -714,10 +714,28 @@ out_fds: return err; } +static long do_restart_poll(struct restart_block *restart_block) +{ + struct pollfd __user *ufds = (struct pollfd __user*)restart_block->arg0; + int nfds = restart_block->arg1; + s64 timeout = ((s64)restart_block->arg3<<32) | (s64)restart_block->arg2; + int ret; + + ret = do_sys_poll(ufds, nfds, &timeout); + if (ret == -EINTR) { + restart_block->fn = do_restart_poll; + restart_block->arg2 = timeout & 0xFFFFFFFF; + restart_block->arg3 = (u64)timeout >> 32; + ret = -ERESTART_RESTARTBLOCK; + } + return ret; +} + asmlinkage long sys_poll(struct pollfd __user *ufds, unsigned int nfds, long timeout_msecs) { s64 timeout_jiffies; + int ret; if (timeout_msecs > 0) { #if HZ > 1000 @@ -732,7 +750,18 @@ asmlinkage long sys_poll(struct pollfd __user *ufds, unsigned int nfds, timeout_jiffies = timeout_msecs; } - return do_sys_poll(ufds, nfds, &timeout_jiffies); + ret = do_sys_poll(ufds, nfds, &timeout_jiffies); + if (ret == -EINTR) { + struct restart_block *restart_block; + restart_block = ¤t_thread_info()->restart_block; + restart_block->fn = do_restart_poll; + restart_block->arg0 = (unsigned long)ufds; + restart_block->arg1 = nfds; + restart_block->arg2 = timeout_jiffies & 0xFFFFFFFF; + restart_block->arg3 = (u64)timeout_jiffies >> 32; + ret = -ERESTART_RESTARTBLOCK; + } + return ret; } #ifdef TIF_RESTORE_SIGMASK |