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| author | Chen Gang <gang.chen.5i5j@gmail.com> | 2013-11-19 11:10:43 +0800 |
|---|---|---|
| committer | Richard Kuo <rkuo@codeaurora.org> | 2014-04-04 18:19:59 -0500 |
| commit | 196b933d295975ada570dd8cc6e10b420cc83882 (patch) | |
| tree | 41fe1317b382c579ab2b7f0f6b7b12142a4b8e79 /arch/hexagon | |
| parent | d811d8cc549fcb4b5f19f4daeb0d08b57aa15627 (diff) | |
| download | lwn-196b933d295975ada570dd8cc6e10b420cc83882.tar.gz lwn-196b933d295975ada570dd8cc6e10b420cc83882.zip | |
arch: hexagon: kernel: add export symbol function __delay()
Need add __delay() implementation, or can not pass allmodconfig in
next-20131118 tree.
The related error:
CC kernel/locking/spinlock_debug.o
kernel/locking/spinlock_debug.c: In function '__spin_lock_debug':
kernel/locking/spinlock_debug.c:114:3: error: implicit declaration of function '__delay' [-Werror=implicit-function-declaration]
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Diffstat (limited to 'arch/hexagon')
| -rw-r--r-- | arch/hexagon/include/asm/delay.h | 1 | ||||
| -rw-r--r-- | arch/hexagon/kernel/time.c | 9 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/delay.h b/arch/hexagon/include/asm/delay.h index 53079719d667..8933b9b1a3bf 100644 --- a/arch/hexagon/include/asm/delay.h +++ b/arch/hexagon/include/asm/delay.h @@ -21,6 +21,7 @@ #include <asm/param.h> +extern void __delay(unsigned long cycles); extern void __udelay(unsigned long usecs); #define udelay(usecs) __udelay((usecs)) diff --git a/arch/hexagon/kernel/time.c b/arch/hexagon/kernel/time.c index d0c4f5a04b7b..17fbf45bf150 100644 --- a/arch/hexagon/kernel/time.c +++ b/arch/hexagon/kernel/time.c @@ -229,6 +229,15 @@ void __init time_init(void) late_time_init = time_init_deferred; } +void __delay(unsigned long cycles) +{ + unsigned long long start = __vmgettime(); + + while ((__vmgettime() - start) < cycles) + cpu_relax(); +} +EXPORT_SYMBOL(__delay); + /* * This could become parametric or perhaps even computed at run-time, * but for now we take the observed simulator jitter. |