Commit 151db1fc authored by Tony Breeds's avatar Tony Breeds Committed by Linus Torvalds
Browse files

Fix compilation of powerpc asm-offsets.c with old gcc 



Commit ad7f7167 ("[POWERPC] Use a
sensible default for clock_getres() in the VDSO") corrected the clock
resolution reported by the VDSO clock_getres() but introduced another
problem in that older versions of gcc (gcc-4.0 and earlier) fail to
compile the new code in arch/powerpc/kernel/asm-offsets.c.

This fixes it by introducing a new MONOTONIC_RES_NSEC define in the
generic code which is equivalent to KTIME_MONOTONIC_RES but is just an
integer constant, not a ktime union.

Signed-off-by: default avatarTony Breeds <tony@bakeyournoodle.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 145e9230

arch/powerpc/kernel/asm-offsets.c

+1 −1
Original line number Diff line number Diff line
@@ -313,7 +313,7 @@ int main(void) 
	DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);

	DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);

	DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);

	DEFINE(CLOCK_REALTIME_RES, (KTIME_MONOTONIC_RES).tv64);

	DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);



#ifdef CONFIG_BUG

	DEFINE(BUG_ENTRY_SIZE, sizeof(struct bug_entry));

include/linux/hrtimer.h

+4 −1
Original line number Diff line number Diff line
@@ -225,11 +225,14 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer) 
 * idea of the (in)accuracy of timers. Timer values are rounded up to

 * this resolution values.

 */

# define KTIME_HIGH_RES		(ktime_t) { .tv64 = 1 }

# define HIGH_RES_NSEC		1

# define KTIME_HIGH_RES		(ktime_t) { .tv64 = HIGH_RES_NSEC }

# define MONOTONIC_RES_NSEC	HIGH_RES_NSEC

# define KTIME_MONOTONIC_RES	KTIME_HIGH_RES



#else



# define MONOTONIC_RES_NSEC	LOW_RES_NSEC

# define KTIME_MONOTONIC_RES	KTIME_LOW_RES



/*

include/linux/ktime.h

+2 −1
Original line number Diff line number Diff line
@@ -316,7 +316,8 @@ static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec) 
 * idea of the (in)accuracy of timers. Timer values are rounded up to

 * this resolution values.

 */

#define KTIME_LOW_RES		(ktime_t){ .tv64 = TICK_NSEC }

#define LOW_RES_NSEC		TICK_NSEC

#define KTIME_LOW_RES		(ktime_t){ .tv64 = LOW_RES_NSEC }



/* Get the monotonic time in timespec format: */

extern void ktime_get_ts(struct timespec *ts);

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