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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:47:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:47:59 +0000 |
commit | 8c87665b42c616a0d83837405ed44e90d1cacaee (patch) | |
tree | 7aa741e9343d0b73b2f72ea1b78ef8785653288b /debian/patches-rt/0008-printk-ringbuffer-Cleanup-reader-terminology.patch | |
parent | Merging upstream version 6.7.12. (diff) | |
download | linux-8c87665b42c616a0d83837405ed44e90d1cacaee.tar.xz linux-8c87665b42c616a0d83837405ed44e90d1cacaee.zip |
Adding debian version 6.7.12-1.debian/6.7.12-1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0008-printk-ringbuffer-Cleanup-reader-terminology.patch')
-rw-r--r-- | debian/patches-rt/0008-printk-ringbuffer-Cleanup-reader-terminology.patch | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/debian/patches-rt/0008-printk-ringbuffer-Cleanup-reader-terminology.patch b/debian/patches-rt/0008-printk-ringbuffer-Cleanup-reader-terminology.patch deleted file mode 100644 index cfd6ca7a28..0000000000 --- a/debian/patches-rt/0008-printk-ringbuffer-Cleanup-reader-terminology.patch +++ /dev/null @@ -1,67 +0,0 @@ -From: John Ogness <john.ogness@linutronix.de> -Date: Mon, 6 Nov 2023 15:01:58 +0000 -Subject: [PATCH 08/50] printk: ringbuffer: Cleanup reader terminology -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.7/older/patches-6.7-rt6.tar.xz - -With the lockless ringbuffer, it is allowed that multiple -CPUs/contexts write simultaneously into the buffer. This creates -an ambiguity as some writers will finalize sooner. - -The documentation for the prb_read functions is not clear as it -refers to "not yet written" and "no data available". Clarify the -return values and language to be in terms of the reader: records -available for reading. - -Signed-off-by: John Ogness <john.ogness@linutronix.de> -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - kernel/printk/printk_ringbuffer.c | 16 +++++++++------- - 1 file changed, 9 insertions(+), 7 deletions(-) - ---- a/kernel/printk/printk_ringbuffer.c -+++ b/kernel/printk/printk_ringbuffer.c -@@ -1987,11 +1987,13 @@ u64 prb_first_seq(struct printk_ringbuff - } - - /* -- * Non-blocking read of a record. Updates @seq to the last finalized record -- * (which may have no data available). -+ * Non-blocking read of a record. - * -- * See the description of prb_read_valid() and prb_read_valid_info() -- * for details. -+ * On success @seq is updated to the record that was read and (if provided) -+ * @r and @line_count will contain the read/calculated data. -+ * -+ * On failure @seq is updated to a record that is not yet available to the -+ * reader, but it will be the next record available to the reader. - */ - static bool _prb_read_valid(struct printk_ringbuffer *rb, u64 *seq, - struct printk_record *r, unsigned int *line_count) -@@ -2010,7 +2012,7 @@ static bool _prb_read_valid(struct print - *seq = tail_seq; - - } else if (err == -ENOENT) { -- /* Record exists, but no data available. Skip. */ -+ /* Record exists, but the data was lost. Skip. */ - (*seq)++; - - } else { -@@ -2043,7 +2045,7 @@ static bool _prb_read_valid(struct print - * On success, the reader must check r->info.seq to see which record was - * actually read. This allows the reader to detect dropped records. - * -- * Failure means @seq refers to a not yet written record. -+ * Failure means @seq refers to a record not yet available to the reader. - */ - bool prb_read_valid(struct printk_ringbuffer *rb, u64 seq, - struct printk_record *r) -@@ -2073,7 +2075,7 @@ bool prb_read_valid(struct printk_ringbu - * On success, the reader must check info->seq to see which record meta data - * was actually read. This allows the reader to detect dropped records. - * -- * Failure means @seq refers to a not yet written record. -+ * Failure means @seq refers to a record not yet available to the reader. - */ - bool prb_read_valid_info(struct printk_ringbuffer *rb, u64 seq, - struct printk_info *info, unsigned int *line_count) |