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Message-Id: <1405619953-5475-3-git-send-email-elder@linaro.org> Date: Thu, 17 Jul 2014 12:59:10 -0500 From: Alex Elder <elder@...aro.org> To: akpm@...ux-foundation.org Cc: kay@...y.org, pmladek@...e.cz, bp@...e.de, john.stultz@...aro.org, jack@...e.cz, linux-kernel@...r.kernel.org Subject: [PATCH 2/5] printk: update previous message for LOG_PREFIX If log_store() gets flags containing LOG_PREFIX, it indicates the record getting stored should implicitly complete the previous log record and start a new one. We can also ensure the previous record is completed by keeping track of the previously-logged record, and adding the LOG_NEWLINE flag to it when log_store() sees a LOG_PREFIX flag. Signed-off-by: Alex Elder <elder@...aro.org> --- kernel/printk/printk.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index e35d91a..6b72a77 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -242,6 +242,9 @@ static size_t syslog_partial; static u64 log_first_seq; static u32 log_first_idx; +/* Pointer to the last record written into the log */ +static struct printk_log *log_last_msg; + /* index and sequence number of the next record to store in the buffer */ static u64 log_next_seq; static u32 log_next_idx; @@ -425,7 +428,13 @@ static int log_store(int facility, int level, log_next_idx = 0; } - /* fill message */ + /* + * If we're forcing a new log record, update the flags for + * the previous one to mark it complete. + */ + if (flags & LOG_PREFIX && log_last_msg) + log_last_msg->flags |= LOG_NEWLINE; + msg = (struct printk_log *)(log_buf + log_next_idx); memcpy(log_text(msg), text, text_len); msg->text_len = text_len; @@ -449,6 +458,9 @@ static int log_store(int facility, int level, log_next_idx += msg->len; log_next_seq++; + /* Save our previous record address for next time. */ + log_last_msg = msg; + return msg->text_len; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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