File: [Development] / linux-2.6-xfs / include / asm-mips / system.h (download)
Revision 1.18, Wed Sep 12 17:09:56 2007 UTC (10 years, 1 month ago) by tes.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.17: +17 -25
lines
Update 2.6.x-xfs to 2.6.23-rc4.
Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:
--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
xfs ioctl __user annotations
commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
mm: Remove slab destructors from kmem_cache_create().
commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
mm: fault feedback #1
commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
mm: merge populate and nopage into fault (fixes nonlinear)
commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
mm: fix fault vs invalidate race for linear mappings
commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
knfsd: exportfs: add exportfs.h header
commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
Freezer: make kernel threads nonfreezable by default
commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
mm: clean up and kernelify shrinker registration
commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
Add suspend-related notifications for CPU hotplug
commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
Fix occurrences of "the the "
commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2003, 06 by Ralf Baechle
* Copyright (C) 1996 by Paul M. Antoine
* Copyright (C) 1999 Silicon Graphics
* Kevin D. Kissell, kevink@mips.org and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc.
*/
#ifndef _ASM_SYSTEM_H
#define _ASM_SYSTEM_H
#include <linux/types.h>
#include <linux/irqflags.h>
#include <asm/addrspace.h>
#include <asm/barrier.h>
#include <asm/cpu-features.h>
#include <asm/dsp.h>
#include <asm/war.h>
/*
* switch_to(n) should switch tasks to task nr n, first
* checking that n isn't the current task, in which case it does nothing.
*/
extern asmlinkage void *resume(void *last, void *next, void *next_ti);
struct task_struct;
#ifdef CONFIG_MIPS_MT_FPAFF
/*
* Handle the scheduler resume end of FPU affinity management. We do this
* inline to try to keep the overhead down. If we have been forced to run on
* a "CPU" with an FPU because of a previous high level of FP computation,
* but did not actually use the FPU during the most recent time-slice (CU1
* isn't set), we undo the restriction on cpus_allowed.
*
* We're not calling set_cpus_allowed() here, because we have no need to
* force prompt migration - we're already switching the current CPU to a
* different thread.
*/
#define __mips_mt_fpaff_switch_to(prev) \
do { \
struct thread_info *__prev_ti = task_thread_info(prev); \
\
if (cpu_has_fpu && \
test_ti_thread_flag(__prev_ti, TIF_FPUBOUND) && \
(!(KSTK_STATUS(prev) & ST0_CU1))) { \
clear_ti_thread_flag(__prev_ti, TIF_FPUBOUND); \
prev->cpus_allowed = prev->thread.user_cpus_allowed; \
} \
next->thread.emulated_fp = 0; \
} while(0)
#else
#define __mips_mt_fpaff_switch_to(prev) do { (void) (prev); } while (0)
#endif
#define switch_to(prev,next,last) \
do { \
__mips_mt_fpaff_switch_to(prev); \
if (cpu_has_dsp) \
__save_dsp(prev); \
(last) = resume(prev, next, task_thread_info(next)); \
if (cpu_has_dsp) \
__restore_dsp(current); \
if (cpu_has_userlocal) \
write_c0_userlocal(task_thread_info(current)->tp_value);\
} while(0)
static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
{
__u32 retval;
if (cpu_has_llsc && R10000_LLSC_WAR) {
unsigned long dummy;
__asm__ __volatile__(
" .set mips3 \n"
"1: ll %0, %3 # xchg_u32 \n"
" .set mips0 \n"
" move %2, %z4 \n"
" .set mips3 \n"
" sc %2, %1 \n"
" beqzl %2, 1b \n"
" .set mips0 \n"
: "=&r" (retval), "=m" (*m), "=&r" (dummy)
: "R" (*m), "Jr" (val)
: "memory");
} else if (cpu_has_llsc) {
unsigned long dummy;
__asm__ __volatile__(
" .set mips3 \n"
"1: ll %0, %3 # xchg_u32 \n"
" .set mips0 \n"
" move %2, %z4 \n"
" .set mips3 \n"
" sc %2, %1 \n"
" beqz %2, 2f \n"
" .subsection 2 \n"
"2: b 1b \n"
" .previous \n"
" .set mips0 \n"
: "=&r" (retval), "=m" (*m), "=&r" (dummy)
: "R" (*m), "Jr" (val)
: "memory");
} else {
unsigned long flags;
raw_local_irq_save(flags);
retval = *m;
*m = val;
raw_local_irq_restore(flags); /* implies memory barrier */
}
smp_llsc_mb();
return retval;
}
#ifdef CONFIG_64BIT
static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val)
{
__u64 retval;
if (cpu_has_llsc && R10000_LLSC_WAR) {
unsigned long dummy;
__asm__ __volatile__(
" .set mips3 \n"
"1: lld %0, %3 # xchg_u64 \n"
" move %2, %z4 \n"
" scd %2, %1 \n"
" beqzl %2, 1b \n"
" .set mips0 \n"
: "=&r" (retval), "=m" (*m), "=&r" (dummy)
: "R" (*m), "Jr" (val)
: "memory");
} else if (cpu_has_llsc) {
unsigned long dummy;
__asm__ __volatile__(
" .set mips3 \n"
"1: lld %0, %3 # xchg_u64 \n"
" move %2, %z4 \n"
" scd %2, %1 \n"
" beqz %2, 2f \n"
" .subsection 2 \n"
"2: b 1b \n"
" .previous \n"
" .set mips0 \n"
: "=&r" (retval), "=m" (*m), "=&r" (dummy)
: "R" (*m), "Jr" (val)
: "memory");
} else {
unsigned long flags;
raw_local_irq_save(flags);
retval = *m;
*m = val;
raw_local_irq_restore(flags); /* implies memory barrier */
}
smp_llsc_mb();
return retval;
}
#else
extern __u64 __xchg_u64_unsupported_on_32bit_kernels(volatile __u64 * m, __u64 val);
#define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels
#endif
/* This function doesn't exist, so you'll get a linker error
if something tries to do an invalid xchg(). */
extern void __xchg_called_with_bad_pointer(void);
static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
{
switch (size) {
case 4:
return __xchg_u32(ptr, x);
case 8:
return __xchg_u64(ptr, x);
}
__xchg_called_with_bad_pointer();
return x;
}
#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
#define __HAVE_ARCH_CMPXCHG 1
static inline unsigned long __cmpxchg_u32(volatile int * m, unsigned long old,
unsigned long new)
{
__u32 retval;
if (cpu_has_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: ll %0, %2 # __cmpxchg_u32 \n"
" bne %0, %z3, 2f \n"
" .set mips0 \n"
" move $1, %z4 \n"
" .set mips3 \n"
" sc $1, %1 \n"
" beqzl $1, 1b \n"
"2: \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else if (cpu_has_llsc) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: ll %0, %2 # __cmpxchg_u32 \n"
" bne %0, %z3, 2f \n"
" .set mips0 \n"
" move $1, %z4 \n"
" .set mips3 \n"
" sc $1, %1 \n"
" beqz $1, 3f \n"
"2: \n"
" .subsection 2 \n"
"3: b 1b \n"
" .previous \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else {
unsigned long flags;
raw_local_irq_save(flags);
retval = *m;
if (retval == old)
*m = new;
raw_local_irq_restore(flags); /* implies memory barrier */
}
smp_llsc_mb();
return retval;
}
static inline unsigned long __cmpxchg_u32_local(volatile int * m,
unsigned long old, unsigned long new)
{
__u32 retval;
if (cpu_has_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: ll %0, %2 # __cmpxchg_u32 \n"
" bne %0, %z3, 2f \n"
" .set mips0 \n"
" move $1, %z4 \n"
" .set mips3 \n"
" sc $1, %1 \n"
" beqzl $1, 1b \n"
"2: \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else if (cpu_has_llsc) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: ll %0, %2 # __cmpxchg_u32 \n"
" bne %0, %z3, 2f \n"
" .set mips0 \n"
" move $1, %z4 \n"
" .set mips3 \n"
" sc $1, %1 \n"
" beqz $1, 1b \n"
"2: \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else {
unsigned long flags;
local_irq_save(flags);
retval = *m;
if (retval == old)
*m = new;
local_irq_restore(flags); /* implies memory barrier */
}
return retval;
}
#ifdef CONFIG_64BIT
static inline unsigned long __cmpxchg_u64(volatile int * m, unsigned long old,
unsigned long new)
{
__u64 retval;
if (cpu_has_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: lld %0, %2 # __cmpxchg_u64 \n"
" bne %0, %z3, 2f \n"
" move $1, %z4 \n"
" scd $1, %1 \n"
" beqzl $1, 1b \n"
"2: \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else if (cpu_has_llsc) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: lld %0, %2 # __cmpxchg_u64 \n"
" bne %0, %z3, 2f \n"
" move $1, %z4 \n"
" scd $1, %1 \n"
" beqz $1, 3f \n"
"2: \n"
" .subsection 2 \n"
"3: b 1b \n"
" .previous \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else {
unsigned long flags;
raw_local_irq_save(flags);
retval = *m;
if (retval == old)
*m = new;
raw_local_irq_restore(flags); /* implies memory barrier */
}
smp_llsc_mb();
return retval;
}
static inline unsigned long __cmpxchg_u64_local(volatile int * m,
unsigned long old, unsigned long new)
{
__u64 retval;
if (cpu_has_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: lld %0, %2 # __cmpxchg_u64 \n"
" bne %0, %z3, 2f \n"
" move $1, %z4 \n"
" scd $1, %1 \n"
" beqzl $1, 1b \n"
"2: \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else if (cpu_has_llsc) {
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: lld %0, %2 # __cmpxchg_u64 \n"
" bne %0, %z3, 2f \n"
" move $1, %z4 \n"
" scd $1, %1 \n"
" beqz $1, 1b \n"
"2: \n"
" .set pop \n"
: "=&r" (retval), "=R" (*m)
: "R" (*m), "Jr" (old), "Jr" (new)
: "memory");
} else {
unsigned long flags;
local_irq_save(flags);
retval = *m;
if (retval == old)
*m = new;
local_irq_restore(flags); /* implies memory barrier */
}
return retval;
}
#else
extern unsigned long __cmpxchg_u64_unsupported_on_32bit_kernels(
volatile int * m, unsigned long old, unsigned long new);
#define __cmpxchg_u64 __cmpxchg_u64_unsupported_on_32bit_kernels
extern unsigned long __cmpxchg_u64_local_unsupported_on_32bit_kernels(
volatile int * m, unsigned long old, unsigned long new);
#define __cmpxchg_u64_local __cmpxchg_u64_local_unsupported_on_32bit_kernels
#endif
/* This function doesn't exist, so you'll get a linker error
if something tries to do an invalid cmpxchg(). */
extern void __cmpxchg_called_with_bad_pointer(void);
static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old,
unsigned long new, int size)
{
switch (size) {
case 4:
return __cmpxchg_u32(ptr, old, new);
case 8:
return __cmpxchg_u64(ptr, old, new);
}
__cmpxchg_called_with_bad_pointer();
return old;
}
static inline unsigned long __cmpxchg_local(volatile void * ptr,
unsigned long old, unsigned long new, int size)
{
switch (size) {
case 4:
return __cmpxchg_u32_local(ptr, old, new);
case 8:
return __cmpxchg_u64_local(ptr, old, new);
}
__cmpxchg_called_with_bad_pointer();
return old;
}
#define cmpxchg(ptr,old,new) \
((__typeof__(*(ptr)))__cmpxchg((ptr), \
(unsigned long)(old), (unsigned long)(new),sizeof(*(ptr))))
#define cmpxchg_local(ptr,old,new) \
((__typeof__(*(ptr)))__cmpxchg_local((ptr), \
(unsigned long)(old), (unsigned long)(new),sizeof(*(ptr))))
extern void set_handler (unsigned long offset, void *addr, unsigned long len);
extern void set_uncached_handler (unsigned long offset, void *addr, unsigned long len);
typedef void (*vi_handler_t)(void);
extern void *set_vi_handler (int n, vi_handler_t addr);
extern void *set_except_vector(int n, void *addr);
extern unsigned long ebase;
extern void per_cpu_trap_init(void);
extern int stop_a_enabled;
/*
* See include/asm-ia64/system.h; prevents deadlock on SMP
* systems.
*/
#define __ARCH_WANT_UNLOCKED_CTXSW
extern unsigned long arch_align_stack(unsigned long sp);
#endif /* _ASM_SYSTEM_H */
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