diff options
Diffstat (limited to 'kernel/futex_compat.c')
| -rw-r--r-- | kernel/futex_compat.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c index 7d5e4b016f3..04ac3a9e42c 100644 --- a/kernel/futex_compat.c +++ b/kernel/futex_compat.c @@ -30,7 +30,7 @@ fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry, return 0; } -static void __user *futex_uaddr(struct robust_list *entry, +static void __user *futex_uaddr(struct robust_list __user *entry, compat_long_t futex_offset) { compat_uptr_t base = ptr_to_compat(entry); @@ -54,6 +54,9 @@ void compat_exit_robust_list(struct task_struct *curr) compat_long_t futex_offset; int rc; + if (!futex_cmpxchg_enabled) + return; + /* * Fetch the list head (which was registered earlier, via * sys_set_robust_list()): @@ -115,6 +118,9 @@ asmlinkage long compat_sys_set_robust_list(struct compat_robust_list_head __user *head, compat_size_t len) { + if (!futex_cmpxchg_enabled) + return -ENOSYS; + if (unlikely(len != sizeof(*head))) return -EINVAL; @@ -130,6 +136,9 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, struct compat_robust_list_head __user *head; unsigned long ret; + if (!futex_cmpxchg_enabled) + return -ENOSYS; + if (!pid) head = current->compat_robust_list; else { |