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s390/smp: kasan stack instrumentation support

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smp_start_secondary function is called without DAT enabled. To avoid
disabling kasan instrumentation for entire arch/s390/kernel/smp.c
smp_start_secondary has been split in 2 parts. smp_start_secondary has
instrumentation disabled, it does minimal setup and enables DAT. Then
instrumentated __smp_start_secondary is called to do the rest.

__load_psw_mask function instrumentation has been disabled as well
to be able to call it from smp_start_secondary.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik
2017-11-20 12:13:52 +01:00
committed by Martin Schwidefsky
parent dde709d136
commit 9e8df6daed
2 changed files with 4 additions and 4 deletions
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arch/s390/include/asm/processor.h
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@@ -336,7 +336,7 @@ static inline void __load_psw(psw_t psw)
* Set PSW mask to specified value, while leaving the
* PSW addr pointing to the next instruction.
*/
static inline void __load_psw_mask(unsigned long mask)
static __no_sanitize_address_or_inline void __load_psw_mask(unsigned long mask)
{
unsigned long addr;
psw_t psw;