diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-10-13 23:35:27 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-11-09 13:20:58 +0300 |
| commit | 85cde0192a983b227341be11af2c3625d39bc374 (patch) | |
| tree | 5f2ad53b6f1cc90058350ebe04f7e342b509ca09 /arch/s390/include | |
| parent | 13b5bd8af41ca56fd11cc0281f2a1201d8342233 (diff) | |
| download | linux-85cde0192a983b227341be11af2c3625d39bc374.tar.xz | |
s390/udelay: make it work for the early code
Currently udelay relies on working EXT interrupts handler, which is not
the case during early startup. In such cases udelay_simple() has to be
used instead.
To avoid mistakes of calling udelay too early, which could happen from
the common code as well - make udelay work for the early code by
introducing static branch and redirecting all udelay calls to
udelay_simple until EXT interrupts handler is fully initialized and
async stack is allocated.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/delay.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/delay.h b/arch/s390/include/asm/delay.h index 898323fd93d2..4a08379cd1eb 100644 --- a/arch/s390/include/asm/delay.h +++ b/arch/s390/include/asm/delay.h @@ -13,6 +13,7 @@ #ifndef _S390_DELAY_H #define _S390_DELAY_H +void udelay_enable(void); void __ndelay(unsigned long long nsecs); void __udelay(unsigned long long usecs); void udelay_simple(unsigned long long usecs); |