diff options
Diffstat (limited to 'debian/patches-rt/0027-printk-nbcon-Assign-priority-based-on-CPU-state.patch')
| -rw-r--r-- | debian/patches-rt/0027-printk-nbcon-Assign-priority-based-on-CPU-state.patch | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/debian/patches-rt/0027-printk-nbcon-Assign-priority-based-on-CPU-state.patch b/debian/patches-rt/0027-printk-nbcon-Assign-priority-based-on-CPU-state.patch deleted file mode 100644 index 0c7282fce7..0000000000 --- a/debian/patches-rt/0027-printk-nbcon-Assign-priority-based-on-CPU-state.patch +++ /dev/null @@ -1,113 +0,0 @@ -From: John Ogness <john.ogness@linutronix.de> -Date: Thu, 14 Dec 2023 14:38:42 +0000 -Subject: [PATCH 27/50] printk: nbcon: Assign priority based on CPU state -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.7/older/patches-6.7-rt6.tar.xz - -Use the current state of the CPU to determine which priority to -assign to the printing context. - -Note: The uart_port wrapper, which is responsible for non-console- - printing activities, will always use NORMAL priority. - -Signed-off-by: John Ogness <john.ogness@linutronix.de> -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - kernel/printk/internal.h | 2 ++ - kernel/printk/nbcon.c | 30 ++++++++++++++++++++++++++++-- - 2 files changed, 30 insertions(+), 2 deletions(-) - ---- a/kernel/printk/internal.h -+++ b/kernel/printk/internal.h -@@ -79,6 +79,7 @@ void nbcon_seq_force(struct console *con - bool nbcon_alloc(struct console *con); - void nbcon_init(struct console *con); - void nbcon_free(struct console *con); -+enum nbcon_prio nbcon_get_default_prio(void); - void nbcon_atomic_flush_all(void); - bool nbcon_atomic_emit_next_record(struct console *con, bool *handover, int cookie); - -@@ -135,6 +136,7 @@ static inline void nbcon_seq_force(struc - static inline bool nbcon_alloc(struct console *con) { return false; } - static inline void nbcon_init(struct console *con) { } - static inline void nbcon_free(struct console *con) { } -+static inline enum nbcon_prio nbcon_get_default_prio(void) { return NBCON_PRIO_NONE; } - static inline void nbcon_atomic_flush_all(void) { } - static inline bool nbcon_atomic_emit_next_record(struct console *con, bool *handover, - int cookie) { return false; } ---- a/kernel/printk/nbcon.c -+++ b/kernel/printk/nbcon.c -@@ -962,6 +962,22 @@ static bool nbcon_atomic_emit_one(struct - } - - /** -+ * nbcon_get_default_prio - The appropriate nbcon priority to use for nbcon -+ * printing on the current CPU -+ * -+ * Context: Any context which could not be migrated to another CPU. -+ * Return: The nbcon_prio to use for acquiring an nbcon console in this -+ * context for printing. -+ */ -+enum nbcon_prio nbcon_get_default_prio(void) -+{ -+ if (this_cpu_in_panic()) -+ return NBCON_PRIO_PANIC; -+ -+ return NBCON_PRIO_NORMAL; -+} -+ -+/** - * nbcon_atomic_emit_next_record - Print one record for an nbcon console - * using the write_atomic() callback - * @con: The console to print on -@@ -997,7 +1013,7 @@ bool nbcon_atomic_emit_next_record(struc - cant_migrate(); - - ctxt->console = con; -- ctxt->prio = NBCON_PRIO_NORMAL; -+ ctxt->prio = nbcon_get_default_prio(); - - progress = nbcon_atomic_emit_one(&wctxt); - -@@ -1043,7 +1059,6 @@ static void __nbcon_atomic_flush_all(u64 - memset(ctxt, 0, sizeof(*ctxt)); - ctxt->console = con; - ctxt->spinwait_max_us = 2000; -- ctxt->prio = NBCON_PRIO_NORMAL; - - /* - * Atomic flushing does not use console driver -@@ -1052,9 +1067,14 @@ static void __nbcon_atomic_flush_all(u64 - * disabled to avoid being interrupted and then - * calling into a driver that will deadlock trying - * acquire console ownership. -+ * -+ * This also disables migration in order to get the -+ * current CPU priority. - */ - local_irq_save(irq_flags); - -+ ctxt->prio = nbcon_get_default_prio(); -+ - any_progress |= nbcon_atomic_emit_one(&wctxt); - - local_irq_restore(irq_flags); -@@ -1166,6 +1186,9 @@ static inline bool uart_is_nbcon(struct - * - * If @up is an nbcon console, this console will be acquired and marked as - * unsafe. Otherwise this function does nothing. -+ * -+ * nbcon consoles acquired via the port lock wrapper always use priority -+ * NBCON_PRIO_NORMAL. - */ - void nbcon_acquire(struct uart_port *up) - { -@@ -1200,6 +1223,9 @@ EXPORT_SYMBOL_GPL(nbcon_acquire); - * - * If @up is an nbcon console, the console will be marked as safe and - * released. Otherwise this function does nothing. -+ * -+ * nbcon consoles acquired via the port lock wrapper always use priority -+ * NBCON_PRIO_NORMAL. - */ - void nbcon_release(struct uart_port *up) - { |