diff options
Diffstat (limited to 'debian/patches-rt/0036-printk-Provide-helper-for-message-prepending.patch')
| -rw-r--r-- | debian/patches-rt/0036-printk-Provide-helper-for-message-prepending.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/debian/patches-rt/0036-printk-Provide-helper-for-message-prepending.patch b/debian/patches-rt/0036-printk-Provide-helper-for-message-prepending.patch new file mode 100644 index 0000000000..97530d96f9 --- /dev/null +++ b/debian/patches-rt/0036-printk-Provide-helper-for-message-prepending.patch @@ -0,0 +1,82 @@ +From: John Ogness <john.ogness@linutronix.de> +Date: Thu, 28 Mar 2024 13:29:10 +0000 +Subject: [PATCH 36/46] printk: Provide helper for message prepending +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.9/older/patches-6.9-rt5.tar.xz + +In order to support prepending different texts to printk +messages, split out the prepending code into a helper +function. + +Signed-off-by: John Ogness <john.ogness@linutronix.de> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + kernel/printk/printk.c | 38 +++++++++++++++++++++++++++----------- + 1 file changed, 27 insertions(+), 11 deletions(-) + +--- a/kernel/printk/printk.c ++++ b/kernel/printk/printk.c +@@ -2806,30 +2806,25 @@ static void __console_unlock(void) + #ifdef CONFIG_PRINTK + + /* +- * Prepend the message in @pmsg->pbufs->outbuf with a "dropped message". This +- * is achieved by shifting the existing message over and inserting the dropped +- * message. ++ * Prepend the message in @pmsg->pbufs->outbuf with the message in ++ * @pmsg->pbufs->scratchbuf. This is achieved by shifting the existing message ++ * over and inserting the scratchbuf message. + * + * @pmsg is the printk message to prepend. + * +- * @dropped is the dropped count to report in the dropped message. ++ * @len is the length of the message in @pmsg->pbufs->scratchbuf. + * + * If the message text in @pmsg->pbufs->outbuf does not have enough space for +- * the dropped message, the message text will be sufficiently truncated. ++ * the scratchbuf message, the message text will be sufficiently truncated. + * + * If @pmsg->pbufs->outbuf is modified, @pmsg->outbuf_len is updated. + */ +-void console_prepend_dropped(struct printk_message *pmsg, unsigned long dropped) ++static void __console_prepend_scratch(struct printk_message *pmsg, size_t len) + { + struct printk_buffers *pbufs = pmsg->pbufs; +- const size_t scratchbuf_sz = sizeof(pbufs->scratchbuf); + const size_t outbuf_sz = sizeof(pbufs->outbuf); + char *scratchbuf = &pbufs->scratchbuf[0]; + char *outbuf = &pbufs->outbuf[0]; +- size_t len; +- +- len = scnprintf(scratchbuf, scratchbuf_sz, +- "** %lu printk messages dropped **\n", dropped); + + /* + * Make sure outbuf is sufficiently large before prepending. +@@ -2852,6 +2847,27 @@ void console_prepend_dropped(struct prin + } + + /* ++ * Prepend the message in @pmsg->pbufs->outbuf with a "dropped message". ++ * @pmsg->outbuf_len is updated appropriately. ++ * ++ * @pmsg is the printk message to prepend. ++ * ++ * @dropped is the dropped count to report in the dropped message. ++ */ ++void console_prepend_dropped(struct printk_message *pmsg, unsigned long dropped) ++{ ++ struct printk_buffers *pbufs = pmsg->pbufs; ++ const size_t scratchbuf_sz = sizeof(pbufs->scratchbuf); ++ char *scratchbuf = &pbufs->scratchbuf[0]; ++ size_t len; ++ ++ len = scnprintf(scratchbuf, scratchbuf_sz, ++ "** %lu printk messages dropped **\n", dropped); ++ ++ __console_prepend_scratch(pmsg, len); ++} ++ ++/* + * Read and format the specified record (or a later record if the specified + * record is not available). + * |