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-rw-r--r--include/linux/cgroup.h1
-rw-r--r--include/linux/kprobes.h47
-rw-r--r--include/linux/sched.h1
-rw-r--r--include/linux/syscalls.h5
-rw-r--r--include/mtd/ubi-user.h132
5 files changed, 142 insertions, 44 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index e267e62827bb..e4e8e117d27d 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -99,6 +99,7 @@ static inline bool css_tryget(struct cgroup_subsys_state *css)
while (!atomic_inc_not_zero(&css->refcnt)) {
if (test_bit(CSS_REMOVED, &css->flags))
return false;
+ cpu_relax();
}
return true;
}
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index d6ea19e314bb..32851eef48f0 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -49,6 +49,13 @@
/* Attach to insert probes on any functions which should be ignored*/
#define __kprobes __attribute__((__section__(".kprobes.text"))) notrace
+#else /* CONFIG_KPROBES */
+typedef int kprobe_opcode_t;
+struct arch_specific_insn {
+ int dummy;
+};
+#define __kprobes notrace
+#endif /* CONFIG_KPROBES */
struct kprobe;
struct pt_regs;
@@ -131,23 +138,6 @@ struct jprobe {
/* For backward compatibility with old code using JPROBE_ENTRY() */
#define JPROBE_ENTRY(handler) (handler)
-DECLARE_PER_CPU(struct kprobe *, current_kprobe);
-DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
-
-#ifdef CONFIG_KRETPROBES
-extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
- struct pt_regs *regs);
-extern int arch_trampoline_kprobe(struct kprobe *p);
-#else /* CONFIG_KRETPROBES */
-static inline void arch_prepare_kretprobe(struct kretprobe *rp,
- struct pt_regs *regs)
-{
-}
-static inline int arch_trampoline_kprobe(struct kprobe *p)
-{
- return 0;
-}
-#endif /* CONFIG_KRETPROBES */
/*
* Function-return probe -
* Note:
@@ -188,6 +178,25 @@ struct kprobe_blackpoint {
unsigned long range;
};
+#ifdef CONFIG_KPROBES
+DECLARE_PER_CPU(struct kprobe *, current_kprobe);
+DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
+
+#ifdef CONFIG_KRETPROBES
+extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
+ struct pt_regs *regs);
+extern int arch_trampoline_kprobe(struct kprobe *p);
+#else /* CONFIG_KRETPROBES */
+static inline void arch_prepare_kretprobe(struct kretprobe *rp,
+ struct pt_regs *regs)
+{
+}
+static inline int arch_trampoline_kprobe(struct kprobe *p)
+{
+ return 0;
+}
+#endif /* CONFIG_KRETPROBES */
+
extern struct kretprobe_blackpoint kretprobe_blacklist[];
static inline void kretprobe_assert(struct kretprobe_instance *ri,
@@ -264,10 +273,6 @@ void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
#else /* CONFIG_KPROBES */
-#define __kprobes notrace
-struct jprobe;
-struct kretprobe;
-
static inline struct kprobe *get_kprobe(void *addr)
{
return NULL;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 02e16d207304..5a7c76388731 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -630,7 +630,6 @@ struct user_struct {
atomic_t inotify_devs; /* How many inotify devs does this user have opened? */
#endif
#ifdef CONFIG_EPOLL
- atomic_t epoll_devs; /* The number of epoll descriptors currently open */
atomic_t epoll_watches; /* The number of file descriptors currently watched */
#endif
#ifdef CONFIG_POSIX_MQUEUE
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 16875f89e6a7..0eda02ff2414 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -108,9 +108,14 @@ struct old_linux_dirent;
asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n" \
"\t.globl ." #alias "\n\t.set ." #alias ", ." #name)
#else
+#ifdef CONFIG_ALPHA
+#define SYSCALL_ALIAS(alias, name) \
+ asm ( #alias " = " #name "\n\t.globl " #alias)
+#else
#define SYSCALL_ALIAS(alias, name) \
asm ("\t.globl " #alias "\n\t.set " #alias ", " #name)
#endif
+#endif
#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index 2dc2eb2b8e22..296efae3525e 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -40,37 +40,37 @@
* UBI volume creation
* ~~~~~~~~~~~~~~~~~~~
*
- * UBI volumes are created via the %UBI_IOCMKVOL IOCTL command of UBI character
+ * UBI volumes are created via the %UBI_IOCMKVOL ioctl command of UBI character
* device. A &struct ubi_mkvol_req object has to be properly filled and a
- * pointer to it has to be passed to the IOCTL.
+ * pointer to it has to be passed to the ioctl.
*
* UBI volume deletion
* ~~~~~~~~~~~~~~~~~~~
*
- * To delete a volume, the %UBI_IOCRMVOL IOCTL command of the UBI character
+ * To delete a volume, the %UBI_IOCRMVOL ioctl command of the UBI character
* device should be used. A pointer to the 32-bit volume ID hast to be passed
- * to the IOCTL.
+ * to the ioctl.
*
* UBI volume re-size
* ~~~~~~~~~~~~~~~~~~
*
- * To re-size a volume, the %UBI_IOCRSVOL IOCTL command of the UBI character
+ * To re-size a volume, the %UBI_IOCRSVOL ioctl command of the UBI character
* device should be used. A &struct ubi_rsvol_req object has to be properly
- * filled and a pointer to it has to be passed to the IOCTL.
+ * filled and a pointer to it has to be passed to the ioctl.
*
* UBI volumes re-name
* ~~~~~~~~~~~~~~~~~~~
*
* To re-name several volumes atomically at one go, the %UBI_IOCRNVOL command
* of the UBI character device should be used. A &struct ubi_rnvol_req object
- * has to be properly filled and a pointer to it has to be passed to the IOCTL.
+ * has to be properly filled and a pointer to it has to be passed to the ioctl.
*
* UBI volume update
* ~~~~~~~~~~~~~~~~~
*
- * Volume update should be done via the %UBI_IOCVOLUP IOCTL command of the
+ * Volume update should be done via the %UBI_IOCVOLUP ioctl command of the
* corresponding UBI volume character device. A pointer to a 64-bit update
- * size should be passed to the IOCTL. After this, UBI expects user to write
+ * size should be passed to the ioctl. After this, UBI expects user to write
* this number of bytes to the volume character device. The update is finished
* when the claimed number of bytes is passed. So, the volume update sequence
* is something like:
@@ -80,14 +80,58 @@
* write(fd, buf, image_size);
* close(fd);
*
- * Atomic eraseblock change
+ * Logical eraseblock erase
* ~~~~~~~~~~~~~~~~~~~~~~~~
*
- * Atomic eraseblock change operation is done via the %UBI_IOCEBCH IOCTL
- * command of the corresponding UBI volume character device. A pointer to
- * &struct ubi_leb_change_req has to be passed to the IOCTL. Then the user is
- * expected to write the requested amount of bytes. This is similar to the
- * "volume update" IOCTL.
+ * To erase a logical eraseblock, the %UBI_IOCEBER ioctl command of the
+ * corresponding UBI volume character device should be used. This command
+ * unmaps the requested logical eraseblock, makes sure the corresponding
+ * physical eraseblock is successfully erased, and returns.
+ *
+ * Atomic logical eraseblock change
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * Atomic logical eraseblock change operation is called using the %UBI_IOCEBCH
+ * ioctl command of the corresponding UBI volume character device. A pointer to
+ * a &struct ubi_leb_change_req object has to be passed to the ioctl. Then the
+ * user is expected to write the requested amount of bytes (similarly to what
+ * should be done in case of the "volume update" ioctl).
+ *
+ * Logical eraseblock map
+ * ~~~~~~~~~~~~~~~~~~~~~
+ *
+ * To map a logical eraseblock to a physical eraseblock, the %UBI_IOCEBMAP
+ * ioctl command should be used. A pointer to a &struct ubi_map_req object is
+ * expected to be passed. The ioctl maps the requested logical eraseblock to
+ * a physical eraseblock and returns. Only non-mapped logical eraseblocks can
+ * be mapped. If the logical eraseblock specified in the request is already
+ * mapped to a physical eraseblock, the ioctl fails and returns error.
+ *
+ * Logical eraseblock unmap
+ * ~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * To unmap a logical eraseblock to a physical eraseblock, the %UBI_IOCEBUNMAP
+ * ioctl command should be used. The ioctl unmaps the logical eraseblocks,
+ * schedules corresponding physical eraseblock for erasure, and returns. Unlike
+ * the "LEB erase" command, it does not wait for the physical eraseblock being
+ * erased. Note, the side effect of this is that if an unclean reboot happens
+ * after the unmap ioctl returns, you may find the LEB mapped again to the same
+ * physical eraseblock after the UBI is run again.
+ *
+ * Check if logical eraseblock is mapped
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * To check if a logical eraseblock is mapped to a physical eraseblock, the
+ * %UBI_IOCEBISMAP ioctl command should be used. It returns %0 if the LEB is
+ * not mapped, and %1 if it is mapped.
+ *
+ * Set an UBI volume property
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * To set an UBI volume property the %UBI_IOCSETPROP ioctl command should be
+ * used. A pointer to a &struct ubi_set_prop_req object is expected to be
+ * passed. The object describes which property should be set, and to which value
+ * it should be set.
*/
/*
@@ -101,7 +145,7 @@
/* Maximum volume name length */
#define UBI_MAX_VOLUME_NAME 127
-/* IOCTL commands of UBI character devices */
+/* ioctl commands of UBI character devices */
#define UBI_IOC_MAGIC 'o'
@@ -114,7 +158,7 @@
/* Re-name volumes */
#define UBI_IOCRNVOL _IOW(UBI_IOC_MAGIC, 3, struct ubi_rnvol_req)
-/* IOCTL commands of the UBI control character device */
+/* ioctl commands of the UBI control character device */
#define UBI_CTRL_IOC_MAGIC 'o'
@@ -123,16 +167,24 @@
/* Detach an MTD device */
#define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, int32_t)
-/* IOCTL commands of UBI volume character devices */
+/* ioctl commands of UBI volume character devices */
#define UBI_VOL_IOC_MAGIC 'O'
/* Start UBI volume update */
#define UBI_IOCVOLUP _IOW(UBI_VOL_IOC_MAGIC, 0, int64_t)
-/* An eraseblock erasure command, used for debugging, disabled by default */
+/* LEB erasure command, used for debugging, disabled by default */
#define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t)
-/* An atomic eraseblock change command */
+/* Atomic LEB change command */
#define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t)
+/* Map LEB command */
+#define UBI_IOCEBMAP _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
+/* Unmap LEB command */
+#define UBI_IOCEBUNMAP _IOW(UBI_VOL_IOC_MAGIC, 4, int32_t)
+/* Check if LEB is mapped command */
+#define UBI_IOCEBISMAP _IOR(UBI_VOL_IOC_MAGIC, 5, int32_t)
+/* Set an UBI volume property */
+#define UBI_IOCSETPROP _IOW(UBI_VOL_IOC_MAGIC, 6, struct ubi_set_prop_req)
/* Maximum MTD device name length supported by UBI */
#define MAX_UBI_MTD_NAME_LEN 127
@@ -168,6 +220,16 @@ enum {
UBI_STATIC_VOLUME = 4,
};
+/*
+ * UBI set property ioctl constants
+ *
+ * @UBI_PROP_DIRECT_WRITE: allow / disallow user to directly write and
+ * erase individual eraseblocks on dynamic volumes
+ */
+enum {
+ UBI_PROP_DIRECT_WRITE = 1,
+};
+
/**
* struct ubi_attach_req - attach MTD device request.
* @ubi_num: UBI device number to create
@@ -305,8 +367,8 @@ struct ubi_rnvol_req {
} __attribute__ ((packed));
/**
- * struct ubi_leb_change_req - a data structure used in atomic logical
- * eraseblock change requests.
+ * struct ubi_leb_change_req - a data structure used in atomic LEB change
+ * requests.
* @lnum: logical eraseblock number to change
* @bytes: how many bytes will be written to the logical eraseblock
* @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN)
@@ -319,4 +381,30 @@ struct ubi_leb_change_req {
int8_t padding[7];
} __attribute__ ((packed));
+/**
+ * struct ubi_map_req - a data structure used in map LEB requests.
+ * @lnum: logical eraseblock number to unmap
+ * @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN)
+ * @padding: reserved for future, not used, has to be zeroed
+ */
+struct ubi_map_req {
+ int32_t lnum;
+ int8_t dtype;
+ int8_t padding[3];
+} __attribute__ ((packed));
+
+
+/**
+ * struct ubi_set_prop_req - a data structure used to set an ubi volume
+ * property.
+ * @property: property to set (%UBI_PROP_DIRECT_WRITE)
+ * @padding: reserved for future, not used, has to be zeroed
+ * @value: value to set
+ */
+struct ubi_set_prop_req {
+ uint8_t property;
+ uint8_t padding[7];
+ uint64_t value;
+} __attribute__ ((packed));
+
#endif /* __UBI_USER_H__ */

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