diff options
| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-03-17 15:03:02 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-03-27 22:18:39 +0200 |
| commit | 9097fc793f74ef9c677f8c4aed0c24f6f07f0133 (patch) | |
| tree | 99665808ffa32d536492c332e87cfa92e1249bdc /arch/s390/kernel | |
| parent | dc2ab23b992c9d5dab93b9bf01b10b10465e537e (diff) | |
| download | linux-9097fc793f74ef9c677f8c4aed0c24f6f07f0133.tar.bz2 | |
s390/smp: cleanup control register update routines
Get rid of duplicate code and redundant data.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/smp.c | 36 |
1 files changed, 12 insertions, 24 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index b7e56fabe387..cc6971a09aaf 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -577,39 +577,27 @@ static void smp_ctl_bit_callback(void *info) } static DEFINE_SPINLOCK(ctl_lock); -static unsigned long ctlreg; -/* - * Set a bit in a control register of all cpus - */ -void smp_ctl_set_bit(int cr, int bit) +void smp_ctl_set_clear_bit(int cr, int bit, bool set) { - struct ec_creg_mask_parms parms = { 1UL << bit, -1UL, cr }; - - spin_lock(&ctl_lock); - memcpy_absolute(&ctlreg, &S390_lowcore.cregs_save_area[cr], sizeof(ctlreg)); - __set_bit(bit, &ctlreg); - memcpy_absolute(&S390_lowcore.cregs_save_area[cr], &ctlreg, sizeof(ctlreg)); - spin_unlock(&ctl_lock); - on_each_cpu(smp_ctl_bit_callback, &parms, 1); -} -EXPORT_SYMBOL(smp_ctl_set_bit); - -/* - * Clear a bit in a control register of all cpus - */ -void smp_ctl_clear_bit(int cr, int bit) -{ - struct ec_creg_mask_parms parms = { 0, ~(1UL << bit), cr }; + struct ec_creg_mask_parms parms = { .cr = cr, }; + u64 ctlreg; + if (set) { + parms.orval = 1UL << bit; + parms.andval = -1UL; + } else { + parms.orval = 0; + parms.andval = ~(1UL << bit); + } spin_lock(&ctl_lock); memcpy_absolute(&ctlreg, &S390_lowcore.cregs_save_area[cr], sizeof(ctlreg)); - __clear_bit(bit, &ctlreg); + ctlreg = (ctlreg & parms.andval) | parms.orval; memcpy_absolute(&S390_lowcore.cregs_save_area[cr], &ctlreg, sizeof(ctlreg)); spin_unlock(&ctl_lock); on_each_cpu(smp_ctl_bit_callback, &parms, 1); } -EXPORT_SYMBOL(smp_ctl_clear_bit); +EXPORT_SYMBOL(smp_ctl_set_clear_bit); #ifdef CONFIG_CRASH_DUMP |