A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

[S390] switch sched_clock to store-clock-extended.

Browse source 
Add get_clock_xt to read an 8 byte clock value using store clock
extended (STCKE) and use get_clock_xt for sched_clock. STCKE should
be faster than STCK on newer machines.

Signed-off-by: Jan Glauber <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
This commit is contained in:
Jan Glauber 2008-04-17 07:46:16 +02:00 • committed by Heiko Carstens
commit c0015f91d8
2 changed files with 8 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

12
include/asm-s390/timex.h
View file

@ -62,16 +62,18 @@ static inline unsigned long long get_clock (void)
return clk;
}
static inline void get_clock_extended(void *dest)
static inline unsigned long long get_clock_xt(void)
{
typedef struct { unsigned long long clk[2]; } __clock_t;
unsigned char clk[16];
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
asm volatile("stcke %0" : "=Q" (*((__clock_t *)dest)) : : "cc");
asm volatile("stcke %0" : "=Q" (clk) : : "cc");
#else /* __GNUC__ */
asm volatile("stcke 0(%1)" : "=m" (*((__clock_t *)dest))
: "a" ((__clock_t *)dest) : "cc");
asm volatile("stcke 0(%1)" : "=m" (clk)
: "a" (clk) : "cc");
#endif /* __GNUC__ */
return *((unsigned long long *)&clk[1]);
}
static inline cycles_t get_cycles(void)