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| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-09-24 18:12:08 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-11-09 13:20:58 +0300 |
| commit | f38b0a743904cc785f5ba0d65dd1f60e17e80387 (patch) | |
| tree | db2cee214a80ba03f8f8877982a4d31a83349977 /arch/s390/include | |
| parent | 85cde0192a983b227341be11af2c3625d39bc374 (diff) | |
| download | linux-f38b0a743904cc785f5ba0d65dd1f60e17e80387.tar.xz | |
s390: remove unused s390_base_ext_handler
s390_base_ext_handler_fn haven't been used since its introduction in
commit ab14de6c37fa ("[S390] Convert memory detection into C code.").
s390_base_ext_handler itself is currently falsely storing 16 registers
at __LC_SAVE_AREA_ASYNC rewriting several following lowcore values:
cpu_flags, return_psw, return_mcck_psw, sync_enter_timer and
async_enter_timer.
Besides that s390_base_ext_handler itself is only potentially hiding
EXT interrupts which should not have happen in the first place. Any
piece of code which requires EXT interrupts before fully functional
ext_int_handler is enabled has to do it on its own, like this is done
by sclp_early_cmd() which is doing EXT interrupts handling synchronously
in sclp_early_wait_irq().
With s390_base_ext_handler removed unexpected EXT interrupt leads
to disabled wait with the address 0x1b0 (__LC_EXT_NEW_PSW), which is
currently setup in the decompressor.
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/processor.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 962da04234af..2043c562ec55 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -318,14 +318,10 @@ static __always_inline void __noreturn disabled_wait(void) } /* - * Basic Machine Check/Program Check Handler. + * Basic Program Check Handler. */ - extern void s390_base_pgm_handler(void); -extern void s390_base_ext_handler(void); - extern void (*s390_base_pgm_handler_fn)(void); -extern void (*s390_base_ext_handler_fn)(void); #define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL |