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s390/ctl_reg: use decoding unions in update_cr_regs

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Add a decoding union for the bits in control registers 2 and use
'union ctlreg0' and 'union ctlreg2' in update_cr_regs to improve
readability.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2017-10-12 13:24:45 +02:00
parent 00a8f886db
commit ad3bc0ac1d
4 changed files with 42 additions and 22 deletions
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19
arch/s390/include/asm/ctl_reg.h
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@@ -54,7 +54,11 @@ void smp_ctl_clear_bit(int cr, int bit);
union ctlreg0 {
unsigned long val;
struct {
unsigned long : 32;
unsigned long : 8;
unsigned long tcx : 1; /* Transactional-Execution control */
unsigned long pifo : 1; /* Transactional-Execution Program-
Interruption-Filtering Override */
unsigned long : 22;
unsigned long : 3;
unsigned long lap : 1; /* Low-address-protection control */
unsigned long : 4;
@@ -70,6 +74,19 @@ union ctlreg0 {
};
};
union ctlreg2 {
unsigned long val;
struct {
unsigned long : 33;
unsigned long ducto : 25;
unsigned long : 1;
unsigned long gse : 1;
unsigned long : 1;
unsigned long tds : 1;
unsigned long tdc : 2;
};
};
#ifdef CONFIG_SMP
# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)