diff options
| author |   Oleg Nesterov <oleg@redhat.com> | 2021-02-01 18:46:41 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2021-03-16 22:13:10 +0100 |
| commit | 5abbe51a526253b9f003e9a0a195638dc882d660 (patch) | |
| tree | e0f3dc2b7a5e21d1ed5349fedfbd5076f82acb1e /include/linux/thread_info.h | |
| parent | Linux 5.12-rc3 (diff) | |
| download | wireguard-linux-5abbe51a526253b9f003e9a0a195638dc882d660.tar.xz wireguard-linux-5abbe51a526253b9f003e9a0a195638dc882d660.zip | |
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
Preparation for fixing get_nr_restart_syscall() on X86 for COMPAT.
Add a new helper which sets restart_block->fn and calls a dummy
arch_set_restart_data() helper.
Fixes: 609c19a385c8 ("x86/ptrace: Stop setting TS_COMPAT in ptrace code")
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210201174641.GA17871@redhat.com
Diffstat (limited to 'include/linux/thread_info.h')
| -rw-r--r-- | include/linux/thread_info.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index 9b2158c69275..157762db9d4b 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -11,6 +11,7 @@ #include <linux/types.h> #include <linux/bug.h> #include <linux/restart_block.h> +#include <linux/errno.h> #ifdef CONFIG_THREAD_INFO_IN_TASK /* @@ -59,6 +60,18 @@ enum syscall_work_bit { #ifdef __KERNEL__ +#ifndef arch_set_restart_data +#define arch_set_restart_data(restart) do { } while (0) +#endif + +static inline long set_restart_fn(struct restart_block *restart, + long (*fn)(struct restart_block *)) +{ + restart->fn = fn; + arch_set_restart_data(restart); + return -ERESTART_RESTARTBLOCK; +} + #ifndef THREAD_ALIGN #define THREAD_ALIGN THREAD_SIZE #endif |