diff options
Diffstat (limited to 'arch/ppc/kernel')
-rw-r--r-- | arch/ppc/kernel/ppc_ksyms.c | 5 | ||||
-rw-r--r-- | arch/ppc/kernel/semaphore.c | 131 | ||||
-rw-r--r-- | arch/ppc/kernel/setup.c | 2 |
3 files changed, 0 insertions, 138 deletions
diff --git a/arch/ppc/kernel/ppc_ksyms.c b/arch/ppc/kernel/ppc_ksyms.c index c353502..2ba659f 100644 --- a/arch/ppc/kernel/ppc_ksyms.c +++ b/arch/ppc/kernel/ppc_ksyms.c @@ -12,7 +12,6 @@ #include <linux/irq.h> #include <linux/pci.h> #include <linux/delay.h> -#include <linux/ide.h> #include <linux/pm.h> #include <linux/bitops.h> @@ -124,10 +123,6 @@ EXPORT_SYMBOL(__ioremap); EXPORT_SYMBOL(iounmap); EXPORT_SYMBOL(ioremap_bot); /* aka VMALLOC_END */ -#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) -EXPORT_SYMBOL(ppc_ide_md); -#endif - #ifdef CONFIG_PCI EXPORT_SYMBOL(isa_io_base); EXPORT_SYMBOL(isa_mem_base); diff --git a/arch/ppc/kernel/semaphore.c b/arch/ppc/kernel/semaphore.c deleted file mode 100644 index 2fe429b..0000000 --- a/arch/ppc/kernel/semaphore.c +++ /dev/null @@ -1,131 +0,0 @@ -/* - * PowerPC-specific semaphore code. - * - * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * April 2001 - Reworked by Paul Mackerras <paulus@samba.org> - * to eliminate the SMP races in the old version between the updates - * of `count' and `waking'. Now we use negative `count' values to - * indicate that some process(es) are waiting for the semaphore. - */ - -#include <linux/sched.h> -#include <linux/init.h> -#include <asm/atomic.h> -#include <asm/semaphore.h> -#include <asm/errno.h> - -/* - * Atomically update sem->count. - * This does the equivalent of the following: - * - * old_count = sem->count; - * tmp = MAX(old_count, 0) + incr; - * sem->count = tmp; - * return old_count; - */ -static inline int __sem_update_count(struct semaphore *sem, int incr) -{ - int old_count, tmp; - - __asm__ __volatile__("\n" -"1: lwarx %0,0,%3\n" -" srawi %1,%0,31\n" -" andc %1,%0,%1\n" -" add %1,%1,%4\n" - PPC405_ERR77(0,%3) -" stwcx. %1,0,%3\n" -" bne 1b" - : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count) - : "r" (&sem->count), "r" (incr), "m" (sem->count) - : "cc"); - - return old_count; -} - -void __up(struct semaphore *sem) -{ - /* - * Note that we incremented count in up() before we came here, - * but that was ineffective since the result was <= 0, and - * any negative value of count is equivalent to 0. - * This ends up setting count to 1, unless count is now > 0 - * (i.e. because some other cpu has called up() in the meantime), - * in which case we just increment count. - */ - __sem_update_count(sem, 1); - wake_up(&sem->wait); -} - -/* - * Note that when we come in to __down or __down_interruptible, - * we have already decremented count, but that decrement was - * ineffective since the result was < 0, and any negative value - * of count is equivalent to 0. - * Thus it is only when we decrement count from some value > 0 - * that we have actually got the semaphore. - */ -void __sched __down(struct semaphore *sem) -{ - struct task_struct *tsk = current; - DECLARE_WAITQUEUE(wait, tsk); - - tsk->state = TASK_UNINTERRUPTIBLE; - add_wait_queue_exclusive(&sem->wait, &wait); - smp_wmb(); - - /* - * Try to get the semaphore. If the count is > 0, then we've - * got the semaphore; we decrement count and exit the loop. - * If the count is 0 or negative, we set it to -1, indicating - * that we are asleep, and then sleep. - */ - while (__sem_update_count(sem, -1) <= 0) { - schedule(); - tsk->state = TASK_UNINTERRUPTIBLE; - } - remove_wait_queue(&sem->wait, &wait); - tsk->state = TASK_RUNNING; - - /* - * If there are any more sleepers, wake one of them up so - * that it can either get the semaphore, or set count to -1 - * indicating that there are still processes sleeping. - */ - wake_up(&sem->wait); -} - -int __sched __down_interruptible(struct semaphore * sem) -{ - int retval = 0; - struct task_struct *tsk = current; - DECLARE_WAITQUEUE(wait, tsk); - - tsk->state = TASK_INTERRUPTIBLE; - add_wait_queue_exclusive(&sem->wait, &wait); - smp_wmb(); - - while (__sem_update_count(sem, -1) <= 0) { - if (signal_pending(current)) { - /* - * A signal is pending - give up trying. - * Set sem->count to 0 if it is negative, - * since we are no longer sleeping. - */ - __sem_update_count(sem, 0); - retval = -EINTR; - break; - } - schedule(); - tsk->state = TASK_INTERRUPTIBLE; - } - tsk->state = TASK_RUNNING; - remove_wait_queue(&sem->wait, &wait); - wake_up(&sem->wait); - return retval; -} diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c index 2940559..bfddfde 100644 --- a/arch/ppc/kernel/setup.c +++ b/arch/ppc/kernel/setup.c @@ -10,7 +10,6 @@ #include <linux/reboot.h> #include <linux/delay.h> #include <linux/initrd.h> -#include <linux/ide.h> #include <linux/screen_info.h> #include <linux/bootmem.h> #include <linux/seq_file.h> @@ -57,7 +56,6 @@ extern void ppc6xx_idle(void); extern void power4_idle(void); extern boot_infos_t *boot_infos; -struct ide_machdep_calls ppc_ide_md; /* Used with the BI_MEMSIZE bootinfo parameter to store the memory size value reported by the boot loader. */ |