diff options
Diffstat (limited to 'debian/patches-rt/0001-printk-nbcon-Relocate-32bit-seq-macros.patch')
| -rw-r--r-- | debian/patches-rt/0001-printk-nbcon-Relocate-32bit-seq-macros.patch | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/debian/patches-rt/0001-printk-nbcon-Relocate-32bit-seq-macros.patch b/debian/patches-rt/0001-printk-nbcon-Relocate-32bit-seq-macros.patch deleted file mode 100644 index 5de6d46854..0000000000 --- a/debian/patches-rt/0001-printk-nbcon-Relocate-32bit-seq-macros.patch +++ /dev/null @@ -1,141 +0,0 @@ -From: John Ogness <john.ogness@linutronix.de> -Date: Wed, 6 Dec 2023 12:01:56 +0000 -Subject: [PATCH 01/50] printk: nbcon: Relocate 32bit seq macros -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.7/older/patches-6.7-rt6.tar.xz - -The macros __seq_to_nbcon_seq() and __nbcon_seq_to_seq() are -used to provide support for atomic handling of sequence numbers -on 32bit systems. Until now this was only used by nbcon.c, -which is why they were located in nbcon.c and include nbcon in -the name. - -In a follow-up commit this functionality is also needed by -printk_ringbuffer. Rather than duplicating the functionality, -relocate the macros to printk_ringbuffer.h. - -Also, since the macros will be no longer nbcon-specific, rename -them to __u64seq_to_ulseq() and __ulseq_to_u64seq(). - -This does not result in any functional change. - -Signed-off-by: John Ogness <john.ogness@linutronix.de> -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - kernel/printk/nbcon.c | 41 +++----------------------------------- - kernel/printk/printk_ringbuffer.h | 33 ++++++++++++++++++++++++++++++ - 2 files changed, 37 insertions(+), 37 deletions(-) - ---- a/kernel/printk/nbcon.c -+++ b/kernel/printk/nbcon.c -@@ -140,39 +140,6 @@ static inline bool nbcon_state_try_cmpxc - return atomic_try_cmpxchg(&ACCESS_PRIVATE(con, nbcon_state), &cur->atom, new->atom); - } - --#ifdef CONFIG_64BIT -- --#define __seq_to_nbcon_seq(seq) (seq) --#define __nbcon_seq_to_seq(seq) (seq) -- --#else /* CONFIG_64BIT */ -- --#define __seq_to_nbcon_seq(seq) ((u32)seq) -- --static inline u64 __nbcon_seq_to_seq(u32 nbcon_seq) --{ -- 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 -- * number from the ringbuffer and fold it. -- * -- * Having a 32bit representation in the console is sufficient. -- * If a console ever gets more than 2^31 records behind -- * the ringbuffer then this is the least of the problems. -- * -- * Also the access to the ring buffer is always safe. -- */ -- rb_next_seq = prb_next_seq(prb); -- seq = rb_next_seq - ((u32)rb_next_seq - nbcon_seq); -- -- return seq; --} -- --#endif /* CONFIG_64BIT */ -- - /** - * nbcon_seq_read - Read the current console sequence - * @con: Console to read the sequence of -@@ -183,7 +150,7 @@ u64 nbcon_seq_read(struct console *con) - { - unsigned long nbcon_seq = atomic_long_read(&ACCESS_PRIVATE(con, nbcon_seq)); - -- return __nbcon_seq_to_seq(nbcon_seq); -+ return __ulseq_to_u64seq(prb, nbcon_seq); - } - - /** -@@ -204,7 +171,7 @@ void nbcon_seq_force(struct console *con - */ - u64 valid_seq = max_t(u64, seq, prb_first_valid_seq(prb)); - -- atomic_long_set(&ACCESS_PRIVATE(con, nbcon_seq), __seq_to_nbcon_seq(valid_seq)); -+ atomic_long_set(&ACCESS_PRIVATE(con, nbcon_seq), __u64seq_to_ulseq(valid_seq)); - - /* Clear con->seq since nbcon consoles use con->nbcon_seq instead. */ - con->seq = 0; -@@ -223,11 +190,11 @@ void nbcon_seq_force(struct console *con - */ - static void nbcon_seq_try_update(struct nbcon_context *ctxt, u64 new_seq) - { -- unsigned long nbcon_seq = __seq_to_nbcon_seq(ctxt->seq); -+ unsigned long nbcon_seq = __u64seq_to_ulseq(ctxt->seq); - struct console *con = ctxt->console; - - if (atomic_long_try_cmpxchg(&ACCESS_PRIVATE(con, nbcon_seq), &nbcon_seq, -- __seq_to_nbcon_seq(new_seq))) { -+ __u64seq_to_ulseq(new_seq))) { - ctxt->seq = new_seq; - } else { - ctxt->seq = nbcon_seq_read(con); ---- a/kernel/printk/printk_ringbuffer.h -+++ b/kernel/printk/printk_ringbuffer.h -@@ -381,4 +381,37 @@ bool prb_read_valid_info(struct printk_r - u64 prb_first_valid_seq(struct printk_ringbuffer *rb); - u64 prb_next_seq(struct printk_ringbuffer *rb); - -+#ifdef CONFIG_64BIT -+ -+#define __u64seq_to_ulseq(u64seq) (u64seq) -+#define __ulseq_to_u64seq(rb, ulseq) (ulseq) -+ -+#else /* CONFIG_64BIT */ -+ -+#define __u64seq_to_ulseq(u64seq) ((u32)u64seq) -+ -+static inline u64 __ulseq_to_u64seq(struct printk_ringbuffer *rb, u32 ulseq) -+{ -+ 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 -+ * number from the ringbuffer and fold it. -+ * -+ * Having a 32bit representation in the console is sufficient. -+ * If a console ever gets more than 2^31 records behind -+ * the ringbuffer then this is the least of the problems. -+ * -+ * Also the access to the ring buffer is always safe. -+ */ -+ rb_next_seq = prb_next_seq(rb); -+ seq = rb_next_seq - ((u32)rb_next_seq - ulseq); -+ -+ return seq; -+} -+ -+#endif /* CONFIG_64BIT */ -+ - #endif /* _KERNEL_PRINTK_RINGBUFFER_H */ |