#include "linux/slab.h"
#include "linux/sound.h"
#include "linux/soundcard.h"
- #include "linux/smp_lock.h"
+ #include "linux/mutex.h"
#include "asm/uaccess.h"
#include "init.h"
#include "os.h"
" This is used to specify the host mixer device to the hostaudio driver.\n"\
" The default is \"" HOSTAUDIO_DEV_MIXER "\".\n\n"
+module_param(dsp, charp, 0644);
+MODULE_PARM_DESC(dsp, DSP_HELP);
+module_param(mixer, charp, 0644);
+MODULE_PARM_DESC(mixer, MIXER_HELP);
+
#ifndef MODULE
static int set_dsp(char *name, int *add)
{
}
__uml_setup("mixer=", set_mixer, "mixer=<mixer device>\n" MIXER_HELP);
-
-#else /*MODULE*/
-
-module_param(dsp, charp, 0644);
-MODULE_PARM_DESC(dsp, DSP_HELP);
-
-module_param(mixer, charp, 0644);
-MODULE_PARM_DESC(mixer, MIXER_HELP);
-
#endif
+ static DEFINE_MUTEX(hostaudio_mutex);
+
/* /dev/dsp file operations */
static ssize_t hostaudio_read(struct file *file, char __user *buffer,
w = 1;
kparam_block_sysfs_write(dsp);
- lock_kernel();
+ mutex_lock(&hostaudio_mutex);
ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
- unlock_kernel();
+ mutex_unlock(&hostaudio_mutex);
kparam_unblock_sysfs_write(dsp);
if (ret < 0) {
w = 1;
kparam_block_sysfs_write(mixer);
- lock_kernel();
+ mutex_lock(&hostaudio_mutex);
ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
- unlock_kernel();
+ mutex_unlock(&hostaudio_mutex);
kparam_unblock_sysfs_write(mixer);
if (ret < 0) {
#include "linux/mm.h"
#include "linux/slab.h"
#include "linux/vmalloc.h"
- #include "linux/smp_lock.h"
+ #include "linux/mutex.h"
#include "linux/blkpg.h"
#include "linux/genhd.h"
#include "linux/spinlock.h"
#define DRIVER_NAME "uml-blkdev"
static DEFINE_MUTEX(ubd_lock);
+ static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
static int ubd_open(struct block_device *bdev, fmode_t mode);
static int ubd_release(struct gendisk *disk, fmode_t mode);
struct scatterlist sg[MAX_SG];
struct request *request;
int start_sg, end_sg;
+ sector_t rq_pos;
};
#define DEFAULT_COW { \
.request = NULL, \
.start_sg = 0, \
.end_sg = 0, \
+ .rq_pos = 0, \
}
/* Protected by ubd_lock */
struct ubd *ubd_dev = disk->private_data;
int err = 0;
- lock_kernel();
+ mutex_lock(&ubd_mutex);
if(ubd_dev->count == 0){
err = ubd_open_dev(ubd_dev);
if(err){
err = -EROFS;
}*/
out:
- unlock_kernel();
+ mutex_unlock(&ubd_mutex);
return err;
}
{
struct ubd *ubd_dev = disk->private_data;
- lock_kernel();
+ mutex_lock(&ubd_mutex);
if(--ubd_dev->count == 0)
ubd_close_dev(ubd_dev);
- unlock_kernel();
+ mutex_unlock(&ubd_mutex);
return 0;
}
{
struct io_thread_req *io_req;
struct request *req;
- sector_t sector;
int n;
while(1){
return;
dev->request = req;
+ dev->rq_pos = blk_rq_pos(req);
dev->start_sg = 0;
dev->end_sg = blk_rq_map_sg(q, req, dev->sg);
}
req = dev->request;
- sector = blk_rq_pos(req);
while(dev->start_sg < dev->end_sg){
struct scatterlist *sg = &dev->sg[dev->start_sg];
return;
}
prepare_request(req, io_req,
- (unsigned long long)sector << 9,
+ (unsigned long long)dev->rq_pos << 9,
sg->offset, sg->length, sg_page(sg));
- sector += sg->length >> 9;
n = os_write_file(thread_fd, &io_req,
sizeof(struct io_thread_req *));
if(n != sizeof(struct io_thread_req *)){
return;
}
+ dev->rq_pos += sg->length >> 9;
dev->start_sg++;
}
dev->end_sg = 0;
return error;
}
-long um_execve(const char *file, char __user *__user *argv, char __user *__user *env)
+long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env)
{
long err;
return err;
}
-long sys_execve(const char __user *file, char __user *__user *argv,
- char __user *__user *env)
+long sys_execve(const char __user *file, const char __user *const __user *argv,
+ const char __user *const __user *env)
{
long error;
char *filename;
- lock_kernel();
filename = getname(file);
error = PTR_ERR(filename);
if (IS_ERR(filename)) goto out;
error = execve1(filename, argv, env);
putname(filename);
out:
- unlock_kernel();
return error;
}
config NFS_FS
tristate "NFS client support"
depends on INET && FILE_LOCKING
+ depends on BKL # fix as soon as lockd is done
select LOCKD
select SUNRPC
select NFS_ACL_SUPPORT if NFS_V3_ACL
config NFS_V4
bool "NFS client support for NFS version 4"
depends on NFS_FS
+ select SUNRPC_GSS
help
This option enables support for version 4 of the NFS protocol
(RFC 3530) in the kernel's NFS client.
tristate "NFS server support"
depends on INET
depends on FILE_LOCKING
+ depends on BKL # fix as soon as lockd is done
select LOCKD
select SUNRPC
select EXPORTFS
depends on NFSD && PROC_FS && EXPERIMENTAL
select NFSD_V3
select FS_POSIX_ACL
+ select SUNRPC_GSS
help
This option enables support in your system's NFS server for
version 4 of the NFS protocol (RFC 3530).
depends on !UML
default y
+config HAVE_IRQ_WORK
+ bool
+
+config IRQ_WORK
+ bool
+ depends on HAVE_IRQ_WORK
+
menu "General setup"
config EXPERIMENTAL
config LOCK_KERNEL
bool
- depends on SMP || PREEMPT
+ depends on (SMP || PREEMPT) && BKL
default y
config INIT_ENV_ARG_LIMIT
depends on AUDITSYSCALL
select FSNOTIFY
+source "kernel/irq/Kconfig"
+
menu "RCU Subsystem"
choice
config TREE_RCU
bool "Tree-based hierarchical RCU"
+ depends on !PREEMPT && SMP
help
This option selects the RCU implementation that is
designed for very large SMP system with hundreds or
smaller systems.
config TREE_PREEMPT_RCU
- bool "Preemptable tree-based hierarchical RCU"
+ bool "Preemptible tree-based hierarchical RCU"
depends on PREEMPT
help
This option selects the RCU implementation that is
is not required. This option greatly reduces the
memory footprint of RCU.
+config TINY_PREEMPT_RCU
+ bool "Preemptible UP-only small-memory-footprint RCU"
+ depends on !SMP && PREEMPT
+ help
+ This option selects the RCU implementation that is designed
+ for real-time UP systems. This option greatly reduces the
+ memory footprint of RCU.
+
endchoice
+config PREEMPT_RCU
+ def_bool ( TREE_PREEMPT_RCU || TINY_PREEMPT_RCU )
+ help
+ This option enables preemptible-RCU code that is common between
+ the TREE_PREEMPT_RCU and TINY_PREEMPT_RCU implementations.
+
config RCU_TRACE
bool "Enable tracing for RCU"
depends on TREE_RCU || TREE_PREEMPT_RCU
help
This option controls the fanout of hierarchical implementations
of RCU, allowing RCU to work efficiently on machines with
- large numbers of CPUs. This value must be at least the cube
- root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit
- systems and up to 262,144 for 64-bit systems.
+ large numbers of CPUs. This value must be at least the fourth
+ root of NR_CPUS, which allows NR_CPUS to be insanely large.
+ The default value of RCU_FANOUT should be used for production
+ systems, but if you are stress-testing the RCU implementation
+ itself, small RCU_FANOUT values allow you to test large-system
+ code paths on small(er) systems.
Select a specific number if testing RCU itself.
Take the default if unsure.
default y if (PROFILING || PERF_COUNTERS)
depends on HAVE_PERF_EVENTS
select ANON_INODES
+ select IRQ_WORK
help
Enable kernel support for various performance events provided
by software and hardware.
static __initdata DECLARE_COMPLETION(kthreadd_done);
static noinline void __init_refok rest_init(void)
- __releases(kernel_lock)
{
int pid;
local_irq_disable();
early_boot_irqs_off();
- early_init_irq_lock_class();
/*
* Interrupts are still disabled. Do necessary setups, then
* makes it inline to init() and it becomes part of init.text section
*/
static noinline int init_post(void)
- __releases(kernel_lock)
{
/* need to finish all async __init code before freeing the memory */
async_synchronize_full();
This feature allows mutex semantics violations to be detected and
reported.
+ config BKL
+ bool "Big Kernel Lock" if (SMP || PREEMPT)
+ default y
+ help
+ This is the traditional lock that is used in old code instead
+ of proper locking. All drivers that use the BKL should depend
+ on this symbol.
+ Say Y here unless you are working on removing the BKL.
+
config DEBUG_LOCK_ALLOC
bool "Lock debugging: detect incorrect freeing of live locks"
depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
select DEBUG_SPINLOCK
select DEBUG_MUTEXES
select DEBUG_LOCK_ALLOC
+ select TRACE_IRQFLAGS
default n
help
This feature enables the kernel to prove that all locking
disabling, allowing multiple RCU-lockdep warnings to be printed
on a single reboot.
+ Say Y to allow multiple RCU-lockdep warnings per boot.
+
+ Say N if you are unsure.
+
+config SPARSE_RCU_POINTER
+ bool "RCU debugging: sparse-based checks for pointer usage"
+ default n
+ help
+ This feature enables the __rcu sparse annotation for
+ RCU-protected pointers. This annotation will cause sparse
+ to flag any non-RCU used of annotated pointers. This can be
+ helpful when debugging RCU usage. Please note that this feature
+ is not intended to enforce code cleanliness; it is instead merely
+ a debugging aid.
+
+ Say Y to make sparse flag questionable use of RCU-protected pointers
+
Say N if you are unsure.
config LOCKDEP
of more runtime overhead.
config TRACE_IRQFLAGS
- depends on DEBUG_KERNEL
bool
- default y
- depends on TRACE_IRQFLAGS_SUPPORT
- depends on PROVE_LOCKING
+ help
+ Enables hooks to interrupt enabling and disabling for
+ either tracing or lock debugging.
config DEBUG_SPINLOCK_SLEEP
bool "Spinlock debugging: sleep-inside-spinlock checking"
Say Y if you are unsure.
+config RCU_CPU_STALL_TIMEOUT
+ int "RCU CPU stall timeout in seconds"
+ depends on RCU_CPU_STALL_DETECTOR
+ range 3 300
+ default 60
+ help
+ If a given RCU grace period extends more than the specified
+ number of seconds, a CPU stall warning is printed. If the
+ RCU grace period persists, additional CPU stall warnings are
+ printed at more widely spaced intervals.
+
+config RCU_CPU_STALL_DETECTOR_RUNNABLE
+ bool "RCU CPU stall checking starts automatically at boot"
+ depends on RCU_CPU_STALL_DETECTOR
+ default y
+ help
+ If set, start checking for RCU CPU stalls immediately on
+ boot. Otherwise, RCU CPU stall checking must be manually
+ enabled.
+
+ Say Y if you are unsure.
+
+ Say N if you wish to suppress RCU CPU stall checking during boot.
+
config RCU_CPU_STALL_VERBOSE
bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR"
depends on RCU_CPU_STALL_DETECTOR && TREE_PREEMPT_RCU
#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/sunrpc/cache.h>
- #include <linux/smp_lock.h>
static struct vfsmount *rpc_mount __read_mostly;
static int rpc_mount_count;
return;
do {
msg = list_entry(head->next, struct rpc_pipe_msg, list);
- list_del(&msg->list);
+ list_del_init(&msg->list);
msg->errno = err;
destroy_msg(msg);
} while (!list_empty(head));
if (msg != NULL) {
spin_lock(&inode->i_lock);
msg->errno = -EAGAIN;
- list_del(&msg->list);
+ list_del_init(&msg->list);
spin_unlock(&inode->i_lock);
rpci->ops->destroy_msg(msg);
}
if (res < 0 || msg->len == msg->copied) {
filp->private_data = NULL;
spin_lock(&inode->i_lock);
- list_del(&msg->list);
+ list_del_init(&msg->list);
spin_unlock(&inode->i_lock);
rpci->ops->destroy_msg(msg);
}
return mask;
}
- static int
- rpc_pipe_ioctl_unlocked(struct file *filp, unsigned int cmd, unsigned long arg)
+ static long
+ rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
- struct rpc_inode *rpci = RPC_I(filp->f_path.dentry->d_inode);
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct rpc_inode *rpci = RPC_I(inode);
int len;
switch (cmd) {
case FIONREAD:
- if (rpci->ops == NULL)
+ spin_lock(&inode->i_lock);
+ if (rpci->ops == NULL) {
+ spin_unlock(&inode->i_lock);
return -EPIPE;
+ }
len = rpci->pipelen;
if (filp->private_data) {
struct rpc_pipe_msg *msg;
msg = (struct rpc_pipe_msg *)filp->private_data;
len += msg->len - msg->copied;
}
+ spin_unlock(&inode->i_lock);
return put_user(len, (int __user *)arg);
default:
return -EINVAL;
}
}
- static long
- rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
- {
- long ret;
-
- lock_kernel();
- ret = rpc_pipe_ioctl_unlocked(filp, cmd, arg);
- unlock_kernel();
-
- return ret;
- }
-
static const struct file_operations rpc_pipe_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
static int
rpc_info_open(struct inode *inode, struct file *file)
{
- struct rpc_clnt *clnt;
+ struct rpc_clnt *clnt = NULL;
int ret = single_open(file, rpc_show_info, NULL);
if (!ret) {
struct seq_file *m = file->private_data;
- mutex_lock(&inode->i_mutex);
- clnt = RPC_I(inode)->private;
- if (clnt) {
- kref_get(&clnt->cl_kref);
+
+ spin_lock(&file->f_path.dentry->d_lock);
+ if (!d_unhashed(file->f_path.dentry))
+ clnt = RPC_I(inode)->private;
+ if (clnt != NULL && atomic_inc_not_zero(&clnt->cl_count)) {
+ spin_unlock(&file->f_path.dentry->d_lock);
m->private = clnt;
} else {
+ spin_unlock(&file->f_path.dentry->d_lock);
single_release(inode, file);
ret = -EINVAL;
}
- mutex_unlock(&inode->i_mutex);
}
return ret;
}
projects / karo-tx-linux.git / commitdiff