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s390/ctlreg: cleanup inline assemblies

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Use symbolic names for operands, remove typedefs, and slightly
refactor the code.

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2023-09-11 21:39:57 +02:00 committed by Vasily Gorbik
parent ebe1cd530f
commit a74e4fc168
1 changed files with 22 additions and 9 deletions
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31
arch/s390/include/asm/ctlreg.h
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@ -36,24 +36,37 @@
#include <linux/bug.h>
#define __ctl_load(array, low, high) do { \
typedef struct { char _[sizeof(array)]; } addrtype; \
struct addrtype { \
char _[sizeof(array)]; \
}; \
int _high = high; \
int _low = low; \
int _esize; \
\
BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
_esize = (_high - _low + 1) * sizeof(unsigned long); \
BUILD_BUG_ON(sizeof(struct addrtype) != _esize); \
asm volatile( \
" lctlg %1,%2,%0\n" \
" lctlg %[_low],%[_high],%[_arr]\n" \
: \
: "Q" (*(addrtype *)(&array)), "i" (low), "i" (high) \
: [_arr] "Q" (*(struct addrtype *)(&array)), \
[_low] "i" (low), [_high] "i" (high) \
: "memory"); \
} while (0)
#define __ctl_store(array, low, high) do { \
typedef struct { char _[sizeof(array)]; } addrtype; \
struct addrtype { \
char _[sizeof(array)]; \
}; \
int _high = high; \
int _low = low; \
int _esize; \
\
BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
_esize = (_high - _low + 1) * sizeof(unsigned long); \
BUILD_BUG_ON(sizeof(struct addrtype) != _esize); \
asm volatile( \
" stctg %1,%2,%0\n" \
: "=Q" (*(addrtype *)(&array)) \
: "i" (low), "i" (high)); \
" stctg %[_low],%[_high],%[_arr]\n" \
: [_arr] "=Q" (*(struct addrtype *)(&array)) \
: [_low] "i" (low), [_high] "i" (high)); \
} while (0)
static __always_inline void __ctl_set_bit(unsigned int cr, unsigned int bit)