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| author | Heiko Carstens <hca@linux.ibm.com> | 2023-09-11 22:40:05 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-09-19 14:26:56 +0300 |
| commit | d11d5c8c8426a4abdcb2252999f1b57e3aa79e5b (patch) | |
| tree | 8d4a4e3f67f7d975c63f34df473bfa1af8f286e8 /arch/s390/include/asm/ctlreg.h | |
| parent | 527618abb92793b9d4dba548d55822dcebd95317 (diff) | |
| download | linux-d11d5c8c8426a4abdcb2252999f1b57e3aa79e5b.tar.xz | |
s390/ctltreg: make initialization of control register save area explicit
Commit e1b9c2749af0 ("s390/smp: ensure global control register contents
are in sync") made the control register save area contained within the
lowcore at absolute address zero a resource which is used when
initializing CPUs. However this is anything but obvious from the code.
Add an ctlreg_init_save_area() function in order to make this explicit.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ctlreg.h')
| -rw-r--r-- | arch/s390/include/asm/ctlreg.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ctlreg.h b/arch/s390/include/asm/ctlreg.h index 57cc610dd997..1f25601d75a0 100644 --- a/arch/s390/include/asm/ctlreg.h +++ b/arch/s390/include/asm/ctlreg.h @@ -110,9 +110,12 @@ static __always_inline void local_ctl_clear_bit(unsigned int cr, unsigned int bi local_ctl_load(cr, ®); } +struct lowcore; + void system_ctlreg_lock(void); void system_ctlreg_unlock(void); void system_ctl_set_clear_bit(unsigned int cr, unsigned int bit, bool set); +void system_ctlreg_init_save_area(struct lowcore *lc); static inline void system_ctl_set_bit(unsigned int cr, unsigned int bit) { |