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arch: hexagon: kernel: add export symbol function __delay()

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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>
This commit is contained in:
Chen Gang 2013-11-19 11:10:43 +08:00 committed by Richard Kuo
parent d811d8cc54
commit 196b933d29
2 changed files with 10 additions and 0 deletions
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1
arch/hexagon/include/asm/delay.h
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@ -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))

9
arch/hexagon/kernel/time.c
View File

@ -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.