Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6

* 'linux-next' of git://git.infradead.org/ubi-2.6:
  UBI: switch to dynamic printks
  UBI: turn some macros into static inline
  UBI: improve checking in debugging prints
  UBI: fix typo in a message
  UBI: fix minor stylistic issues
  UBI: use __packed instead of __attribute__((packed))
  UBI: cleanup comments around volume properties
  UBI: re-name set volume properties ioctl
  UBI: make the control character device non-seekable

drivers/mtd/ubi/cdev.c

@@ -115,7 +115,7 @@ static int vol_cdev_open(struct inode *inode, struct file *file)
 		mode = UBI_READONLY;
 
 	dbg_gen("open device %d, volume %d, mode %d",
-	        ubi_num, vol_id, mode);
+		ubi_num, vol_id, mode);
 
 	desc = ubi_open_volume(ubi_num, vol_id, mode);
 	if (IS_ERR(desc))
@@ -158,7 +158,7 @@ static loff_t vol_cdev_llseek(struct file *file, loff_t offset, int origin)
 	loff_t new_offset;
 
 	if (vol->updating) {
-		 /* Update is in progress, seeking is prohibited */
+		/* Update is in progress, seeking is prohibited */
 		dbg_err("updating");
 		return -EBUSY;
 	}
@@ -561,18 +561,18 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
 	}
 
 	/* Set volume property command */
-	case UBI_IOCSETPROP:
+	case UBI_IOCSETVOLPROP:
 	{
-		struct ubi_set_prop_req req;
+		struct ubi_set_vol_prop_req req;
 
 		err = copy_from_user(&req, argp,
-				sizeof(struct ubi_set_prop_req));
+				     sizeof(struct ubi_set_vol_prop_req));
 		if (err) {
 			err = -EFAULT;
 			break;
 		}
 		switch (req.property) {
-		case UBI_PROP_DIRECT_WRITE:
+		case UBI_VOL_PROP_DIRECT_WRITE:
 			mutex_lock(&ubi->device_mutex);
 			desc->vol->direct_writes = !!req.value;
 			mutex_unlock(&ubi->device_mutex);
@@ -1100,5 +1100,5 @@ const struct file_operations ubi_ctrl_cdev_operations = {
 	.owner          = THIS_MODULE,
 	.unlocked_ioctl = ctrl_cdev_ioctl,
 	.compat_ioctl   = ctrl_cdev_compat_ioctl,
-	.llseek		= noop_llseek,
+	.llseek		= no_llseek,
 };

drivers/mtd/ubi/debug.c

@@ -30,15 +30,12 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 
-unsigned int ubi_msg_flags;
 unsigned int ubi_chk_flags;
 unsigned int ubi_tst_flags;
 
-module_param_named(debug_msgs, ubi_msg_flags, uint, S_IRUGO | S_IWUSR);
 module_param_named(debug_chks, ubi_chk_flags, uint, S_IRUGO | S_IWUSR);
 module_param_named(debug_tsts, ubi_chk_flags, uint, S_IRUGO | S_IWUSR);
 
-MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
 MODULE_PARM_DESC(debug_chks, "Debug check flags");
 MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
 
@@ -75,15 +72,15 @@ void ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)
 {
 	printk(KERN_DEBUG "Volume identifier header dump:\n");
 	printk(KERN_DEBUG "\tmagic     %08x\n", be32_to_cpu(vid_hdr->magic));
-	printk(KERN_DEBUG "\tversion   %d\n",   (int)vid_hdr->version);
-	printk(KERN_DEBUG "\tvol_type  %d\n",   (int)vid_hdr->vol_type);
-	printk(KERN_DEBUG "\tcopy_flag %d\n",   (int)vid_hdr->copy_flag);
-	printk(KERN_DEBUG "\tcompat    %d\n",   (int)vid_hdr->compat);
-	printk(KERN_DEBUG "\tvol_id    %d\n",   be32_to_cpu(vid_hdr->vol_id));
-	printk(KERN_DEBUG "\tlnum      %d\n",   be32_to_cpu(vid_hdr->lnum));
-	printk(KERN_DEBUG "\tdata_size %d\n",   be32_to_cpu(vid_hdr->data_size));
-	printk(KERN_DEBUG "\tused_ebs  %d\n",   be32_to_cpu(vid_hdr->used_ebs));
-	printk(KERN_DEBUG "\tdata_pad  %d\n",   be32_to_cpu(vid_hdr->data_pad));
+	printk(KERN_DEBUG "\tversion   %d\n",  (int)vid_hdr->version);
+	printk(KERN_DEBUG "\tvol_type  %d\n",  (int)vid_hdr->vol_type);
+	printk(KERN_DEBUG "\tcopy_flag %d\n",  (int)vid_hdr->copy_flag);
+	printk(KERN_DEBUG "\tcompat    %d\n",  (int)vid_hdr->compat);
+	printk(KERN_DEBUG "\tvol_id    %d\n",  be32_to_cpu(vid_hdr->vol_id));
+	printk(KERN_DEBUG "\tlnum      %d\n",  be32_to_cpu(vid_hdr->lnum));
+	printk(KERN_DEBUG "\tdata_size %d\n",  be32_to_cpu(vid_hdr->data_size));
+	printk(KERN_DEBUG "\tused_ebs  %d\n",  be32_to_cpu(vid_hdr->used_ebs));
+	printk(KERN_DEBUG "\tdata_pad  %d\n",  be32_to_cpu(vid_hdr->data_pad));
 	printk(KERN_DEBUG "\tsqnum     %llu\n",
 		(unsigned long long)be64_to_cpu(vid_hdr->sqnum));
 	printk(KERN_DEBUG "\thdr_crc   %08x\n", be32_to_cpu(vid_hdr->hdr_crc));

drivers/mtd/ubi/debug.h

@@ -21,11 +21,17 @@
 #ifndef __UBI_DEBUG_H__
 #define __UBI_DEBUG_H__
 
+struct ubi_ec_hdr;
+struct ubi_vid_hdr;
+struct ubi_volume;
+struct ubi_vtbl_record;
+struct ubi_scan_volume;
+struct ubi_scan_leb;
+struct ubi_mkvol_req;
+
 #ifdef CONFIG_MTD_UBI_DEBUG
 #include <linux/random.h>
 
-#define dbg_err(fmt, ...) ubi_err(fmt, ##__VA_ARGS__)
-
 #define ubi_assert(expr)  do {                                               \
 	if (unlikely(!(expr))) {                                             \
 		printk(KERN_CRIT "UBI assert failed in %s at %u (pid %d)\n", \
@@ -34,24 +40,28 @@
 	}                                                                    \
 } while (0)
 
-#define dbg_msg(fmt, ...)                                    \
-	printk(KERN_DEBUG "UBI DBG (pid %d): %s: " fmt "\n", \
-	       current->pid, __func__, ##__VA_ARGS__)
-
-#define dbg_do_msg(typ, fmt, ...) do {                       \
-	if (ubi_msg_flags & typ)                             \
-		dbg_msg(fmt, ##__VA_ARGS__);                 \
-} while (0)
+#define dbg_err(fmt, ...) ubi_err(fmt, ##__VA_ARGS__)
 
 #define ubi_dbg_dump_stack() dump_stack()
 
-struct ubi_ec_hdr;
-struct ubi_vid_hdr;
-struct ubi_volume;
-struct ubi_vtbl_record;
-struct ubi_scan_volume;
-struct ubi_scan_leb;
-struct ubi_mkvol_req;
+#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)  \
+		print_hex_dump(l, ps, pt, r, g, b, len, a)
+
+#define ubi_dbg_msg(type, fmt, ...) \
+	pr_debug("UBI DBG " type ": " fmt "\n", ##__VA_ARGS__)
+
+/* Just a debugging messages not related to any specific UBI subsystem */
+#define dbg_msg(fmt, ...) ubi_dbg_msg("msg", fmt, ##__VA_ARGS__)
+/* General debugging messages */
+#define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
+/* Messages from the eraseblock association sub-system */
+#define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__)
+/* Messages from the wear-leveling sub-system */
+#define dbg_wl(fmt, ...)  ubi_dbg_msg("wl", fmt, ##__VA_ARGS__)
+/* Messages from the input/output sub-system */
+#define dbg_io(fmt, ...)  ubi_dbg_msg("io", fmt, ##__VA_ARGS__)
+/* Initialization and build messages */
+#define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__)
 
 void ubi_dbg_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr);
 void ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);
@@ -62,43 +72,6 @@ void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type);
 void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req);
 void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
 
-extern unsigned int ubi_msg_flags;
-
-/*
- * Debugging message type flags (must match msg_type_names in debug.c).
- *
- * UBI_MSG_GEN: general messages
- * UBI_MSG_EBA: journal messages
- * UBI_MSG_WL: mount messages
- * UBI_MSG_IO: commit messages
- * UBI_MSG_BLD: LEB find messages
- */
-enum {
-	UBI_MSG_GEN  = 0x1,
-	UBI_MSG_EBA  = 0x2,
-	UBI_MSG_WL   = 0x4,
-	UBI_MSG_IO   = 0x8,
-	UBI_MSG_BLD  = 0x10,
-};
-
-#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)  \
-		print_hex_dump(l, ps, pt, r, g, b, len, a)
-
-/* General debugging messages */
-#define dbg_gen(fmt, ...) dbg_do_msg(UBI_MSG_GEN, fmt, ##__VA_ARGS__)
-
-/* Messages from the eraseblock association sub-system */
-#define dbg_eba(fmt, ...) dbg_do_msg(UBI_MSG_EBA, fmt, ##__VA_ARGS__)
-
-/* Messages from the wear-leveling sub-system */
-#define dbg_wl(fmt, ...) dbg_do_msg(UBI_MSG_WL, fmt, ##__VA_ARGS__)
-
-/* Messages from the input/output sub-system */
-#define dbg_io(fmt, ...) dbg_do_msg(UBI_MSG_IO, fmt, ##__VA_ARGS__)
-
-/* Initialization and build messages */
-#define dbg_bld(fmt, ...) dbg_do_msg(UBI_MSG_BLD, fmt, ##__VA_ARGS__)
-
 extern unsigned int ubi_chk_flags;
 
 /*
@@ -184,31 +157,61 @@ static inline int ubi_dbg_is_erase_failure(void)
 
 #else
 
-#define ubi_assert(expr)                 ({})
-#define dbg_err(fmt, ...)                ({})
-#define dbg_msg(fmt, ...)                ({})
-#define dbg_gen(fmt, ...)                ({})
-#define dbg_eba(fmt, ...)                ({})
-#define dbg_wl(fmt, ...)                 ({})
-#define dbg_io(fmt, ...)                 ({})
-#define dbg_bld(fmt, ...)                ({})
-#define ubi_dbg_dump_stack()             ({})
-#define ubi_dbg_dump_ec_hdr(ec_hdr)      ({})
-#define ubi_dbg_dump_vid_hdr(vid_hdr)    ({})
-#define ubi_dbg_dump_vol_info(vol)       ({})
-#define ubi_dbg_dump_vtbl_record(r, idx) ({})
-#define ubi_dbg_dump_sv(sv)              ({})
-#define ubi_dbg_dump_seb(seb, type)      ({})
-#define ubi_dbg_dump_mkvol_req(req)      ({})
-#define ubi_dbg_dump_flash(ubi, pnum, offset, len) ({})
-#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)  ({})
-
-#define ubi_dbg_is_bgt_disabled()  0
-#define ubi_dbg_is_bitflip()       0
-#define ubi_dbg_is_write_failure() 0
-#define ubi_dbg_is_erase_failure() 0
-#define ubi_dbg_check_all_ff(ubi, pnum, offset, len) 0
-#define ubi_dbg_check_write(ubi, buf, pnum, offset, len) 0
+/* Use "if (0)" to make compiler check arguments even if debugging is off */
+#define ubi_assert(expr)  do {                                               \
+	if (0) {                                                             \
+		printk(KERN_CRIT "UBI assert failed in %s at %u (pid %d)\n", \
+		       __func__, __LINE__, current->pid);                    \
+	}                                                                    \
+} while (0)
+
+#define dbg_err(fmt, ...) do {                                               \
+	if (0)                                                               \
+		ubi_err(fmt, ##__VA_ARGS__);                                 \
+} while (0)
+
+#define ubi_dbg_msg(fmt, ...) do {                                           \
+	if (0)                                                               \
+		pr_debug(fmt "\n", ##__VA_ARGS__);                           \
+} while (0)
+
+#define dbg_msg(fmt, ...)  ubi_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_gen(fmt, ...)  ubi_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_eba(fmt, ...)  ubi_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_wl(fmt, ...)   ubi_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_io(fmt, ...)   ubi_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_bld(fmt, ...)  ubi_dbg_msg(fmt, ##__VA_ARGS__)
+
+static inline void ubi_dbg_dump_stack(void)                          { return; }
+static inline void
+ubi_dbg_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr)                 { return; }
+static inline void
+ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)              { return; }
+static inline void
+ubi_dbg_dump_vol_info(const struct ubi_volume *vol)                  { return; }
+static inline void
+ubi_dbg_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx)   { return; }
+static inline void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv) { return; }
+static inline void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb,
+				    int type)                        { return; }
+static inline void
+ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req)              { return; }
+static inline void ubi_dbg_dump_flash(struct ubi_device *ubi,
+				      int pnum, int offset, int len) { return; }
+static inline void
+ubi_dbg_print_hex_dump(const char *l, const char *ps, int pt, int r,
+		       int g, const void *b, size_t len, bool a)     { return; }
+
+static inline int ubi_dbg_is_bgt_disabled(void)                    { return 0; }
+static inline int ubi_dbg_is_bitflip(void)                         { return 0; }
+static inline int ubi_dbg_is_write_failure(void)                   { return 0; }
+static inline int ubi_dbg_is_erase_failure(void)                   { return 0; }
+static inline int ubi_dbg_check_all_ff(struct ubi_device *ubi,
+				       int pnum, int offset,
+				       int len)                    { return 0; }
+static inline int ubi_dbg_check_write(struct ubi_device *ubi,
+				      const void *buf, int pnum,
+				      int offset, int len)         { return 0; }
 
 #endif /* !CONFIG_MTD_UBI_DEBUG */
 #endif /* !__UBI_DEBUG_H__ */

drivers/mtd/ubi/io.c

@@ -189,8 +189,8 @@ int ubi_io_read(const struct ubi_device *ubi, void *buf, int pnum, int offset,
 		}
 
 		if (retries++ < UBI_IO_RETRIES) {
-			dbg_io("error %d%s while reading %d bytes from PEB %d:%d,"
-			       " read only %zd bytes, retry",
+			dbg_io("error %d%s while reading %d bytes from PEB "
+			       "%d:%d, read only %zd bytes, retry",
 			       err, errstr, len, pnum, offset, read);
 			yield();
 			goto retry;
@@ -465,7 +465,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
 	}
 
 	err = patt_count;
-	ubi_msg("PEB %d passed torture test, do not mark it a bad", pnum);
+	ubi_msg("PEB %d passed torture test, do not mark it as bad", pnum);
 
 out:
 	mutex_unlock(&ubi->buf_mutex);

drivers/mtd/ubi/scan.c

@@ -1103,7 +1103,7 @@ static int check_what_we_have(struct ubi_device *ubi, struct ubi_scan_info *si)
 		 * otherwise, only print a warning.
 		 */
 		if (si->corr_peb_count >= max_corr) {
-			ubi_err("too many corrupted PEBs, refusing this device");
+			ubi_err("too many corrupted PEBs, refusing");
 			return -EINVAL;
 		}
 	}

drivers/mtd/ubi/ubi-media.h

@@ -164,7 +164,7 @@ struct ubi_ec_hdr {
 	__be32  image_seq;
 	__u8    padding2[32];
 	__be32  hdr_crc;
-} __attribute__ ((packed));
+} __packed;
 
 /**
  * struct ubi_vid_hdr - on-flash UBI volume identifier header.
@@ -292,7 +292,7 @@ struct ubi_vid_hdr {
 	__be64  sqnum;
 	__u8    padding3[12];
 	__be32  hdr_crc;
-} __attribute__ ((packed));
+} __packed;
 
 /* Internal UBI volumes count */
 #define UBI_INT_VOL_COUNT 1
@@ -373,6 +373,6 @@ struct ubi_vtbl_record {
 	__u8    flags;
 	__u8    padding[23];
 	__be32  crc;
-} __attribute__ ((packed));
+} __packed;
 
 #endif /* !__UBI_MEDIA_H__ */

drivers/mtd/ubi/ubi.h

@@ -341,8 +341,8 @@ struct ubi_wl_entry;
  *      protected from the wear-leveling worker)
  * @pq_head: protection queue head
  * @wl_lock: protects the @used, @free, @pq, @pq_head, @lookuptbl, @move_from,
- * 	     @move_to, @move_to_put @erase_pending, @wl_scheduled, @works,
- * 	     @erroneous, and @erroneous_peb_count fields
+ *	     @move_to, @move_to_put @erase_pending, @wl_scheduled, @works,
+ *	     @erroneous, and @erroneous_peb_count fields
  * @move_mutex: serializes eraseblock moves
  * @work_sem: synchronizes the WL worker with use tasks
  * @wl_scheduled: non-zero if the wear-leveling was scheduled

drivers/mtd/ubi/wl.c

@@ -1570,7 +1570,8 @@ void ubi_wl_close(struct ubi_device *ubi)
  * @ec: the erase counter to check
  *
  * This function returns zero if the erase counter of physical eraseblock @pnum
- * is equivalent to @ec, and a negative error code if not or if an error occurred.
+ * is equivalent to @ec, and a negative error code if not or if an error
+ * occurred.
  */
 static int paranoid_check_ec(struct ubi_device *ubi, int pnum, int ec)
 {

include/linux/mtd/ubi.h

@@ -21,7 +21,7 @@
 #ifndef __LINUX_UBI_H__
 #define __LINUX_UBI_H__
 
-#include <asm/ioctl.h>
+#include <linux/ioctl.h>
 #include <linux/types.h>
 #include <mtd/ubi-user.h>
 
@@ -87,7 +87,7 @@ enum {
  * physical eraseblock size and on how much bytes UBI headers consume. But
  * because of the volume alignment (@alignment), the usable size of logical
  * eraseblocks if a volume may be less. The following equation is true:
- * 	@usable_leb_size = LEB size - (LEB size mod @alignment),
+ *	@usable_leb_size = LEB size - (LEB size mod @alignment),
  * where LEB size is the logical eraseblock size defined by the UBI device.
  *
  * The alignment is multiple to the minimal flash input/output unit size or %1

include/mtd/ubi-user.h

@@ -131,7 +131,7 @@
  * ~~~~~~~~~~~~~~~~~~~~~~~~~
  *
  * 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
+ * used. A pointer to a &struct ubi_set_vol_prop_req object is expected to be
  * passed. The object describes which property should be set, and to which value
  * it should be set.
  */
@@ -186,7 +186,8 @@
 /* Check if LEB is mapped command */
 #define UBI_IOCEBISMAP _IOR(UBI_VOL_IOC_MAGIC, 5, __s32)
 /* Set an UBI volume property */
-#define UBI_IOCSETPROP _IOW(UBI_VOL_IOC_MAGIC, 6, struct ubi_set_prop_req)
+#define UBI_IOCSETVOLPROP _IOW(UBI_VOL_IOC_MAGIC, 6, \
+			       struct ubi_set_vol_prop_req)
 
 /* Maximum MTD device name length supported by UBI */
 #define MAX_UBI_MTD_NAME_LEN 127
@@ -223,13 +224,14 @@ enum {
 };
 
 /*
- * UBI set property ioctl constants
+ * UBI set volume property ioctl constants.
  *
- * @UBI_PROP_DIRECT_WRITE: allow / disallow user to directly write and
- *                         erase individual eraseblocks on dynamic volumes
+ * @UBI_VOL_PROP_DIRECT_WRITE: allow (any non-zero value) or disallow (value 0)
+ *                             user to directly write and erase individual
+ *                             eraseblocks on dynamic volumes
  */
 enum {
-       UBI_PROP_DIRECT_WRITE = 1,
+	UBI_VOL_PROP_DIRECT_WRITE = 1,
 };
 
 /**
@@ -308,7 +310,7 @@ struct ubi_mkvol_req {
 	__s16 name_len;
 	__s8 padding2[4];
 	char name[UBI_MAX_VOLUME_NAME + 1];
-} __attribute__ ((packed));
+} __packed;
 
 /**
  * struct ubi_rsvol_req - a data structure used in volume re-size requests.
@@ -324,7 +326,7 @@ struct ubi_mkvol_req {
 struct ubi_rsvol_req {
 	__s64 bytes;
 	__s32 vol_id;
-} __attribute__ ((packed));
+} __packed;
 
 /**
  * struct ubi_rnvol_req - volumes re-name request.
@@ -366,7 +368,7 @@ struct ubi_rnvol_req {
 		__s8  padding2[2];
 		char    name[UBI_MAX_VOLUME_NAME + 1];
 	} ents[UBI_MAX_RNVOL];
-} __attribute__ ((packed));
+} __packed;
 
 /**
  * struct ubi_leb_change_req - a data structure used in atomic LEB change
@@ -381,7 +383,7 @@ struct ubi_leb_change_req {
 	__s32 bytes;
 	__s8  dtype;
 	__s8  padding[7];
-} __attribute__ ((packed));
+} __packed;
 
 /**
  * struct ubi_map_req - a data structure used in map LEB requests.
@@ -393,20 +395,20 @@ struct ubi_map_req {
 	__s32 lnum;
 	__s8  dtype;
 	__s8  padding[3];
-} __attribute__ ((packed));
+} __packed;
 
 
 /**
- * struct ubi_set_prop_req - a data structure used to set an ubi volume
- *                           property.
- * @property: property to set (%UBI_PROP_DIRECT_WRITE)
+ * struct ubi_set_vol_prop_req - a data structure used to set an UBI volume
+ *                               property.
+ * @property: property to set (%UBI_VOL_PROP_DIRECT_WRITE)
  * @padding: reserved for future, not used, has to be zeroed
  * @value: value to set
  */
-struct ubi_set_prop_req {
-       __u8  property;
-       __u8  padding[7];
-       __u64 value;
-}  __attribute__ ((packed));
+struct ubi_set_vol_prop_req {
+	__u8  property;
+	__u8  padding[7];
+	__u64 value;
+}  __packed;
 
 #endif /* __UBI_USER_H__ */