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| author | Vasily Gorbik <gor@linux.ibm.com> | 2019-06-20 10:18:35 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2019-07-02 16:00:27 +0200 |
| commit | da1776733617c4a92319eddb4e765ce60426b20a (patch) | |
| tree | c50aa62af49dff4125a556be6c15dbded73025f1 /arch | |
| parent | 20955746320e252b41c6b3505587766012e3e06d (diff) | |
| download | linux-da1776733617c4a92319eddb4e765ce60426b20a.tar.bz2 | |
s390/unwind: cleanup unused READ_ONCE_TASK_STACK
Kasan instrumentation of backchain unwinder stack reads is disabled
completely and simply uses READ_ONCE_NOCHECK now.
READ_ONCE_TASK_STACK macro is unused and could be removed.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/unwind.h | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/arch/s390/include/asm/unwind.h b/arch/s390/include/asm/unwind.h index 6eb2ef105d87..d827b5b9a32c 100644 --- a/arch/s390/include/asm/unwind.h +++ b/arch/s390/include/asm/unwind.h @@ -79,23 +79,4 @@ static inline void unwind_module_init(struct module *mod, void *orc_ip, size_t orc_ip_size, void *orc, size_t orc_size) {} -#ifdef CONFIG_KASAN -/* - * This disables KASAN checking when reading a value from another task's stack, - * since the other task could be running on another CPU and could have poisoned - * the stack in the meantime. - */ -#define READ_ONCE_TASK_STACK(task, x) \ -({ \ - unsigned long val; \ - if (task == current) \ - val = READ_ONCE(x); \ - else \ - val = READ_ONCE_NOCHECK(x); \ - val; \ -}) -#else -#define READ_ONCE_TASK_STACK(task, x) READ_ONCE(x) -#endif - #endif /* _ASM_S390_UNWIND_H */ |