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| author | Oleg Nesterov <oleg@redhat.com> | 2021-02-01 20:46:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-24 13:26:44 +0300 |
| commit | 27ddd2b59045ed6a39cd9e5d5ced9320c761826f (patch) | |
| tree | fe40ae46488f3063064541cc7b3617b9b909c297 /include | |
| parent | f546965c3aaca36c97ee66b62fad48d56b87f3d1 (diff) | |
| download | linux-27ddd2b59045ed6a39cd9e5d5ced9320c761826f.tar.xz | |
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
commit 5abbe51a526253b9f003e9a0a195638dc882d660 upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -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 e93e249a4e9b..f3040b0b4b23 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 /* @@ -39,6 +40,18 @@ enum { #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 |