source "arch/arm/Kconfig-nommu"
endif
+config PJ4B_ERRATA_4742
+ bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
+ depends on CPU_PJ4B && MACH_ARMADA_370
+ default y
+ help
+ When coming out of either a Wait for Interrupt (WFI) or a Wait for
+ Event (WFE) IDLE states, a specific timing sensitivity exists between
+ the retiring WFI/WFE instructions and the newly issued subsequent
+ instructions. This sensitivity can result in a CPU hang scenario.
+ Workaround:
+ The software must insert either a Data Synchronization Barrier (DSB)
+ or Data Memory Barrier (DMB) command immediately after the WFI/WFE
+ instruction
+
config ARM_ERRATA_326103
bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
depends on CPU_V6
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
- depends on SMP && HOTPLUG
+ depends on SMP
help
Say Y here to experiment with turning CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu.
}
/**
- * sysfs_link_subling - link sysfs_dirent into sibling rbtree
+ * sysfs_link_sibling - link sysfs_dirent into sibling rbtree
* @sd: sysfs_dirent of interest
*
* Link @sd into its sibling rbtree which starts from
return pos;
}
-static int sysfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
+static int sysfs_readdir(struct file *file, struct dir_context *ctx)
{
- struct dentry *dentry = filp->f_path.dentry;
+ struct dentry *dentry = file->f_path.dentry;
struct sysfs_dirent * parent_sd = dentry->d_fsdata;
- struct sysfs_dirent *pos = filp->private_data;
+ struct sysfs_dirent *pos = file->private_data;
enum kobj_ns_type type;
const void *ns;
- ino_t ino;
- loff_t off;
type = sysfs_ns_type(parent_sd);
ns = sysfs_info(dentry->d_sb)->ns[type];
- if (filp->f_pos == 0) {
- ino = parent_sd->s_ino;
- if (filldir(dirent, ".", 1, filp->f_pos, ino, DT_DIR) == 0)
- filp->f_pos++;
- else
- return 0;
- }
- if (filp->f_pos == 1) {
- if (parent_sd->s_parent)
- ino = parent_sd->s_parent->s_ino;
- else
- ino = parent_sd->s_ino;
- if (filldir(dirent, "..", 2, filp->f_pos, ino, DT_DIR) == 0)
- filp->f_pos++;
- else
- return 0;
- }
+ if (!dir_emit_dots(file, ctx))
+ return 0;
mutex_lock(&sysfs_mutex);
- off = filp->f_pos;
- for (pos = sysfs_dir_pos(ns, parent_sd, filp->f_pos, pos);
+ for (pos = sysfs_dir_pos(ns, parent_sd, ctx->pos, pos);
pos;
- pos = sysfs_dir_next_pos(ns, parent_sd, filp->f_pos, pos)) {
- const char * name;
- unsigned int type;
- int len, ret;
-
- name = pos->s_name;
- len = strlen(name);
- ino = pos->s_ino;
- type = dt_type(pos);
- off = filp->f_pos = pos->s_hash;
- filp->private_data = sysfs_get(pos);
+ pos = sysfs_dir_next_pos(ns, parent_sd, ctx->pos, pos)) {
+ const char *name = pos->s_name;
+ unsigned int type = dt_type(pos);
+ int len = strlen(name);
+ ino_t ino = pos->s_ino;
+ ctx->pos = pos->s_hash;
+ file->private_data = sysfs_get(pos);
mutex_unlock(&sysfs_mutex);
- ret = filldir(dirent, name, len, off, ino, type);
+ if (!dir_emit(ctx, name, len, ino, type))
+ return 0;
mutex_lock(&sysfs_mutex);
- if (ret < 0)
- break;
}
mutex_unlock(&sysfs_mutex);
-
- /* don't reference last entry if its refcount is dropped */
- if (!pos) {
- filp->private_data = NULL;
-
- /* EOF and not changed as 0 or 1 in read/write path */
- if (off == filp->f_pos && off > 1)
- filp->f_pos = INT_MAX;
- }
+ file->private_data = NULL;
+ ctx->pos = INT_MAX;
return 0;
}
const struct file_operations sysfs_dir_operations = {
.read = generic_read_dir,
- .readdir = sysfs_readdir,
+ .iterate = sysfs_readdir,
.release = sysfs_dir_release,
.llseek = sysfs_dir_llseek,
};
projects / deliverable / linux.git / commitdiff
