diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-02-24 07:43:51 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:38 +0200 |
| commit | f61046abec83b5341414e0582e01521c34ebff5f (patch) | |
| tree | 5e9e093c1fe3fc972b86f3400e0a0bba3685b64e /arch/s390 | |
| parent | cd81bd92fbd18b40b4b03aa1e77f72f234a51155 (diff) | |
s390: TASK_SIZE for kernel threads
commit fb94a687d96c570d46332a4a890f1dcb7310e643 upstream.
Return a sensible value if TASK_SIZE if called from a kernel thread.
This gets us around an issue with copy_mount_options that does a magic
size calculation "TASK_SIZE - (unsigned long)data" while in a kernel
thread and data pointing to kernel space.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 83c85c217..52ef30cfe 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -48,7 +48,8 @@ extern void execve_tail(void); #else /* CONFIG_64BIT */ -#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit) +#define TASK_SIZE_OF(tsk) ((tsk)->mm ? \ + (tsk)->mm->context.asce_limit : TASK_MAX_SIZE) #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \ (1UL << 30) : (1UL << 41)) #define TASK_SIZE TASK_SIZE_OF(current) |