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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:59 +0000 |
commit | 27d3313807296c3943a96ceef8c2b7279cb56962 (patch) | |
tree | 7d08e78c36ab6437b403fc7cd8c23e41f135c7a3 /debian/patches-rt/0003-printk-Use-prb_first_seq-as-base-for-32bit-seq-macro.patch | |
parent | Merging upstream version 6.7.7. (diff) | |
download | linux-27d3313807296c3943a96ceef8c2b7279cb56962.tar.xz linux-27d3313807296c3943a96ceef8c2b7279cb56962.zip |
Adding debian version 6.7.7-1.debian/6.7.7-1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0003-printk-Use-prb_first_seq-as-base-for-32bit-seq-macro.patch')
-rw-r--r-- | debian/patches-rt/0003-printk-Use-prb_first_seq-as-base-for-32bit-seq-macro.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/debian/patches-rt/0003-printk-Use-prb_first_seq-as-base-for-32bit-seq-macro.patch b/debian/patches-rt/0003-printk-Use-prb_first_seq-as-base-for-32bit-seq-macro.patch new file mode 100644 index 0000000000..f0412681bf --- /dev/null +++ b/debian/patches-rt/0003-printk-Use-prb_first_seq-as-base-for-32bit-seq-macro.patch @@ -0,0 +1,71 @@ +From: John Ogness <john.ogness@linutronix.de> +Date: Wed, 22 Nov 2023 16:13:37 +0000 +Subject: [PATCH 03/50] printk: Use prb_first_seq() as base for 32bit seq + macros +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.7/older/patches-6.7-rt6.tar.xz + +Note: This change only applies to 32bit architectures. On 64bit + architectures the macros are NOPs. + +Currently prb_next_seq() is used as the base for the 32bit seq +macros __u64seq_to_ulseq() and __ulseq_to_u64seq(). However, in +a follow-up commit, prb_next_seq() will need to make use of the +32bit seq macros. + +Use prb_first_seq() as the base for the 32bit seq macros instead +because it is guaranteed to return 64bit sequence numbers without +relying on any 32bit seq macros. + +Signed-off-by: John Ogness <john.ogness@linutronix.de> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + kernel/printk/printk_ringbuffer.c | 2 +- + kernel/printk/printk_ringbuffer.h | 8 ++++---- + 2 files changed, 5 insertions(+), 5 deletions(-) + +--- a/kernel/printk/printk_ringbuffer.c ++++ b/kernel/printk/printk_ringbuffer.c +@@ -1832,7 +1832,7 @@ static int prb_read(struct printk_ringbu + } + + /* Get the sequence number of the tail descriptor. */ +-static u64 prb_first_seq(struct printk_ringbuffer *rb) ++u64 prb_first_seq(struct printk_ringbuffer *rb) + { + struct prb_desc_ring *desc_ring = &rb->desc_ring; + enum desc_state d_state; +--- a/kernel/printk/printk_ringbuffer.h ++++ b/kernel/printk/printk_ringbuffer.h +@@ -378,6 +378,7 @@ bool prb_read_valid(struct printk_ringbu + bool prb_read_valid_info(struct printk_ringbuffer *rb, u64 seq, + struct printk_info *info, unsigned int *line_count); + ++u64 prb_first_seq(struct printk_ringbuffer *rb); + u64 prb_first_valid_seq(struct printk_ringbuffer *rb); + u64 prb_next_seq(struct printk_ringbuffer *rb); + +@@ -392,12 +393,12 @@ u64 prb_next_seq(struct printk_ringbuffe + + static inline u64 __ulseq_to_u64seq(struct printk_ringbuffer *rb, u32 ulseq) + { ++ u64 rb_first_seq = prb_first_seq(rb); + u64 seq; +- u64 rb_next_seq; + + /* + * The provided sequence is only the lower 32 bits of the ringbuffer +- * sequence. It needs to be expanded to 64bit. Get the next sequence ++ * sequence. It needs to be expanded to 64bit. Get the first sequence + * number from the ringbuffer and fold it. + * + * Having a 32bit representation in the console is sufficient. +@@ -406,8 +407,7 @@ static inline u64 __ulseq_to_u64seq(stru + * + * Also the access to the ring buffer is always safe. + */ +- rb_next_seq = prb_next_seq(rb); +- seq = rb_next_seq - (s32)((u32)rb_next_seq - ulseq); ++ seq = rb_first_seq - (s32)((u32)rb_first_seq - ulseq); + + return seq; + } |