printk: rename struct log to struct printk_log

Rename the struct to enable moving portions of
printk.c to separate files.

The rename changes output of /proc/vmcoreinfo.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 8f1fb50aa3cea109e9990a31036eb715f589b653..5b5a7080e2a5f2822dfd93190c05302be74b1784 100644 (file)
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -173,7 +173,7 @@ static int console_may_schedule;
  *         67                           "g"
  *   0032     00 00 00                  padding to next message header
  *
- * The 'struct log' buffer header must never be directly exported to
+ * The 'struct printk_log' buffer header must never be directly exported to
  * userspace, it is a kernel-private implementation detail that might
  * need to be changed in the future, when the requirements change.
  *
@@ -195,7 +195,7 @@ enum log_flags {
        LOG_CONT        = 8,    /* text is a fragment of a continuation line */
 };
 
-struct log {
+struct printk_log {
        u64 ts_nsec;            /* timestamp in nanoseconds */
        u16 len;                /* length of entire record */
        u16 text_len;           /* length of text buffer */
@@ -243,7 +243,7 @@ static u32 clear_idx;
 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
 #define LOG_ALIGN 4
 #else
-#define LOG_ALIGN __alignof__(struct log)
+#define LOG_ALIGN __alignof__(struct printk_log)
 #endif
 #define __LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT)
 static char __log_buf[__LOG_BUF_LEN] __aligned(LOG_ALIGN);
@@ -254,35 +254,35 @@ static u32 log_buf_len = __LOG_BUF_LEN;
 static volatile unsigned int logbuf_cpu = UINT_MAX;
 
 /* human readable text of the record */
-static char *log_text(const struct log *msg)
+static char *log_text(const struct printk_log *msg)
 {
-       return (char *)msg + sizeof(struct log);
+       return (char *)msg + sizeof(struct printk_log);
 }
 
 /* optional key/value pair dictionary attached to the record */
-static char *log_dict(const struct log *msg)
+static char *log_dict(const struct printk_log *msg)
 {
-       return (char *)msg + sizeof(struct log) + msg->text_len;
+       return (char *)msg + sizeof(struct printk_log) + msg->text_len;
 }
 
 /* get record by index; idx must point to valid msg */
-static struct log *log_from_idx(u32 idx)
+static struct printk_log *log_from_idx(u32 idx)
 {
-       struct log *msg = (struct log *)(log_buf + idx);
+       struct printk_log *msg = (struct printk_log *)(log_buf + idx);
 
        /*
         * A length == 0 record is the end of buffer marker. Wrap around and
         * read the message at the start of the buffer.
         */
        if (!msg->len)
-               return (struct log *)log_buf;
+               return (struct printk_log *)log_buf;
        return msg;
 }
 
 /* get next record; idx must point to valid msg */
 static u32 log_next(u32 idx)
 {
-       struct log *msg = (struct log *)(log_buf + idx);
+       struct printk_log *msg = (struct printk_log *)(log_buf + idx);
 
        /* length == 0 indicates the end of the buffer; wrap */
        /*
@@ -291,7 +291,7 @@ static u32 log_next(u32 idx)
         * return the one after that.
         */
        if (!msg->len) {
-               msg = (struct log *)log_buf;
+               msg = (struct printk_log *)log_buf;
                return msg->len;
        }
        return idx + msg->len;
@@ -303,11 +303,11 @@ static void log_store(int facility, int level,
                      const char *dict, u16 dict_len,
                      const char *text, u16 text_len)
 {
-       struct log *msg;
+       struct printk_log *msg;
        u32 size, pad_len;
 
        /* number of '\0' padding bytes to next message */
-       size = sizeof(struct log) + text_len + dict_len;
+       size = sizeof(struct printk_log) + text_len + dict_len;
        pad_len = (-size) & (LOG_ALIGN - 1);
        size += pad_len;
 
@@ -319,7 +319,7 @@ static void log_store(int facility, int level,
                else
                        free = log_first_idx - log_next_idx;
 
-               if (free > size + sizeof(struct log))
+               if (free > size + sizeof(struct printk_log))
                        break;
 
                /* drop old messages until we have enough contiuous space */
@@ -327,18 +327,18 @@ static void log_store(int facility, int level,
                log_first_seq++;
        }
 
-       if (log_next_idx + size + sizeof(struct log) >= log_buf_len) {
+       if (log_next_idx + size + sizeof(struct printk_log) >= log_buf_len) {
                /*
                 * This message + an additional empty header does not fit
                 * at the end of the buffer. Add an empty header with len == 0
                 * to signify a wrap around.
                 */
-               memset(log_buf + log_next_idx, 0, sizeof(struct log));
+               memset(log_buf + log_next_idx, 0, sizeof(struct printk_log));
                log_next_idx = 0;
        }
 
        /* fill message */
-       msg = (struct log *)(log_buf + log_next_idx);
+       msg = (struct printk_log *)(log_buf + log_next_idx);
        memcpy(log_text(msg), text, text_len);
        msg->text_len = text_len;
        memcpy(log_dict(msg), dict, dict_len);
@@ -351,7 +351,7 @@ static void log_store(int facility, int level,
        else
                msg->ts_nsec = local_clock();
        memset(log_dict(msg) + dict_len, 0, pad_len);
-       msg->len = sizeof(struct log) + text_len + dict_len + pad_len;
+       msg->len = sizeof(struct printk_log) + text_len + dict_len + pad_len;
 
        /* insert message */
        log_next_idx += msg->len;
@@ -474,7 +474,7 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
                            size_t count, loff_t *ppos)
 {
        struct devkmsg_user *user = file->private_data;
-       struct log *msg;
+       struct printk_log *msg;
        u64 ts_usec;
        size_t i;
        char cont = '-';
@@ -719,14 +719,14 @@ void log_buf_kexec_setup(void)
        VMCOREINFO_SYMBOL(log_first_idx);
        VMCOREINFO_SYMBOL(log_next_idx);
        /*
-        * Export struct log size and field offsets. User space tools can
+        * Export struct printk_log size and field offsets. User space tools can
         * parse it and detect any changes to structure down the line.
         */
-       VMCOREINFO_STRUCT_SIZE(log);
-       VMCOREINFO_OFFSET(log, ts_nsec);
-       VMCOREINFO_OFFSET(log, len);
-       VMCOREINFO_OFFSET(log, text_len);
-       VMCOREINFO_OFFSET(log, dict_len);
+       VMCOREINFO_STRUCT_SIZE(printk_log);
+       VMCOREINFO_OFFSET(printk_log, ts_nsec);
+       VMCOREINFO_OFFSET(printk_log, len);
+       VMCOREINFO_OFFSET(printk_log, text_len);
+       VMCOREINFO_OFFSET(printk_log, dict_len);
 }
 #endif
 
@@ -879,7 +879,7 @@ static size_t print_time(u64 ts, char *buf)
                       (unsigned long)ts, rem_nsec / 1000);
 }
 
-static size_t print_prefix(const struct log *msg, bool syslog, char *buf)
+static size_t print_prefix(const struct printk_log *msg, bool syslog, char *buf)
 {
        size_t len = 0;
        unsigned int prefix = (msg->facility << 3) | msg->level;
@@ -902,7 +902,7 @@ static size_t print_prefix(const struct log *msg, bool syslog, char *buf)
        return len;
 }
 
-static size_t msg_print_text(const struct log *msg, enum log_flags prev,
+static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
                             bool syslog, char *buf, size_t size)
 {
        const char *text = log_text(msg);
@@ -964,7 +964,7 @@ static size_t msg_print_text(const struct log *msg, enum log_flags prev,
 static int syslog_print(char __user *buf, int size)
 {
        char *text;
-       struct log *msg;
+       struct printk_log *msg;
        int len = 0;
 
        text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
@@ -1055,7 +1055,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
                idx = clear_idx;
                prev = 0;
                while (seq < log_next_seq) {
-                       struct log *msg = log_from_idx(idx);
+                       struct printk_log *msg = log_from_idx(idx);
 
                        len += msg_print_text(msg, prev, true, NULL, 0);
                        prev = msg->flags;
@@ -1068,7 +1068,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
                idx = clear_idx;
                prev = 0;
                while (len > size && seq < log_next_seq) {
-                       struct log *msg = log_from_idx(idx);
+                       struct printk_log *msg = log_from_idx(idx);
 
                        len -= msg_print_text(msg, prev, true, NULL, 0);
                        prev = msg->flags;
@@ -1082,7 +1082,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
                len = 0;
                prev = 0;
                while (len >= 0 && seq < next_seq) {
-                       struct log *msg = log_from_idx(idx);
+                       struct printk_log *msg = log_from_idx(idx);
                        int textlen;
 
                        textlen = msg_print_text(msg, prev, true, text,
@@ -1228,7 +1228,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
 
                        error = 0;
                        while (seq < log_next_seq) {
-                               struct log *msg = log_from_idx(idx);
+                               struct printk_log *msg = log_from_idx(idx);
 
                                error += msg_print_text(msg, prev, true, NULL, 0);
                                idx = log_next(idx);
@@ -1714,10 +1714,10 @@ static struct cont {
        u8 level;
        bool flushed:1;
 } cont;
-static struct log *log_from_idx(u32 idx) { return NULL; }
+static struct printk_log *log_from_idx(u32 idx) { return NULL; }
 static u32 log_next(u32 idx) { return 0; }
 static void call_console_drivers(int level, const char *text, size_t len) {}
-static size_t msg_print_text(const struct log *msg, enum log_flags prev,
+static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
                             bool syslog, char *buf, size_t size) { return 0; }
 static size_t cont_print_text(char *text, size_t size) { return 0; }
 
@@ -2029,7 +2029,7 @@ void console_unlock(void)
        console_cont_flush(text, sizeof(text));
 again:
        for (;;) {
-               struct log *msg;
+               struct printk_log *msg;
                size_t len;
                int level;
 
@@ -2645,7 +2645,7 @@ void kmsg_dump(enum kmsg_dump_reason reason)
 bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog,
                               char *line, size_t size, size_t *len)
 {
-       struct log *msg;
+       struct printk_log *msg;
        size_t l = 0;
        bool ret = false;
 
@@ -2757,7 +2757,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
        idx = dumper->cur_idx;
        prev = 0;
        while (seq < dumper->next_seq) {
-               struct log *msg = log_from_idx(idx);
+               struct printk_log *msg = log_from_idx(idx);
 
                l += msg_print_text(msg, prev, true, NULL, 0);
                idx = log_next(idx);
@@ -2770,7 +2770,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
        idx = dumper->cur_idx;
        prev = 0;
        while (l > size && seq < dumper->next_seq) {
-               struct log *msg = log_from_idx(idx);
+               struct printk_log *msg = log_from_idx(idx);
 
                l -= msg_print_text(msg, prev, true, NULL, 0);
                idx = log_next(idx);
@@ -2785,7 +2785,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
        l = 0;
        prev = 0;
        while (seq < dumper->next_seq) {
-               struct log *msg = log_from_idx(idx);
+               struct printk_log *msg = log_from_idx(idx);
 
                l += msg_print_text(msg, prev, syslog, buf + l, size - l);
                idx = log_next(idx);