diff options
Diffstat (limited to 'arch/x86/kernel/uintr_fd.c')
| -rw-r--r-- | arch/x86/kernel/uintr_fd.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/x86/kernel/uintr_fd.c b/arch/x86/kernel/uintr_fd.c index f2e59d445733..5e6784b50132 100644 --- a/arch/x86/kernel/uintr_fd.c +++ b/arch/x86/kernel/uintr_fd.c @@ -304,16 +304,23 @@ out_fdput: } /* - * sys_uintr_wait - Wait for a user interrupt + * sys_uintr_wait - Wait for a user interrupt for the specified time */ -SYSCALL_DEFINE1(uintr_wait, unsigned int, flags) +SYSCALL_DEFINE2(uintr_wait, u64, usec, unsigned int, flags) { + ktime_t expires; + if (!uintr_arch_enabled()) return -EOPNOTSUPP; if (flags) return -EINVAL; - /* TODO: Add a timeout option */ - return uintr_receiver_wait(); // 主要逻辑在这了 + if (usec == 0) + return 0; + + /* For now, use a default timeout value of 100 usec */ + /* For qemu 2575 is recommend*/ + expires = usec * NSEC_PER_USEC; + return uintr_receiver_wait(&expires); } |