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s390/time: rename store_tod_clock_ext() and use union tod_clock

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Rename store_tod_clock_ext() to store_tod_clock_ext_cc() to reflect
that it returns a condition code and also use union tod_clock as
parameter.

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 2021-02-08 13:56:49 +01:00 • committed by Vasily Gorbik
parent e4101be56c
commit 530f639f1e
2 changed files with 5 additions and 6 deletions
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5
arch/s390/include/asm/timex.h
View file

@ -53,16 +53,15 @@ static inline int set_tod_clock(__u64 time)
return cc;
}
static inline int store_tod_clock_ext(char *time)
static inline int store_tod_clock_ext_cc(union tod_clock *clk)
{
typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype;
int cc;
asm volatile(
" stcke %1\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc), "=Q" (*(addrtype *)time) : : "cc");
: "=d" (cc), "=Q" (*clk) : : "cc");
return cc;
}

6
arch/s390/kernel/early.c
View file

@ -35,12 +35,12 @@
static void __init reset_tod_clock(void)
{
char time[STORE_CLOCK_EXT_SIZE];
union tod_clock clk;
if (store_tod_clock_ext(time) == 0)
if (store_tod_clock_ext_cc(&clk) == 0)
return;
/* TOD clock not running. Set the clock to Unix Epoch. */
if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock_ext(time) != 0)
if (set_tod_clock(TOD_UNIX_EPOCH) || store_tod_clock_ext_cc(&clk))
disabled_wait();
memset(tod_clock_base, 0, 16);