103 lines
2.9 KiB
Diff
103 lines
2.9 KiB
Diff
From: John Ogness <john.ogness@linutronix.de>
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Date: Tue, 12 Sep 2023 13:25:41 +0000
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Subject: [PATCH 105/134] printk: Make console_is_usable() available to nbcon
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
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Move console_is_usable() as-is into internal.h so that it can
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be used by nbcon printing functions as well.
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Signed-off-by: John Ogness <john.ogness@linutronix.de>
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Reviewed-by: Petr Mladek <pmladek@suse.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/printk/internal.h | 32 ++++++++++++++++++++++++++++++++
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kernel/printk/printk.c | 30 ------------------------------
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2 files changed, 32 insertions(+), 30 deletions(-)
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--- a/kernel/printk/internal.h
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+++ b/kernel/printk/internal.h
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@@ -78,6 +78,36 @@ bool nbcon_alloc(struct console *con);
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void nbcon_init(struct console *con);
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void nbcon_free(struct console *con);
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+/*
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+ * Check if the given console is currently capable and allowed to print
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+ * records.
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+ *
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+ * Requires the console_srcu_read_lock.
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+ */
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+static inline bool console_is_usable(struct console *con)
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+{
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+ short flags = console_srcu_read_flags(con);
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+
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+ if (!(flags & CON_ENABLED))
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+ return false;
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+
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+ if ((flags & CON_SUSPENDED))
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+ return false;
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+
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+ if (!con->write)
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+ return false;
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+
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+ /*
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+ * Console drivers may assume that per-cpu resources have been
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+ * allocated. So unless they're explicitly marked as being able to
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+ * cope (CON_ANYTIME) don't call them until this CPU is officially up.
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+ */
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+ if (!cpu_online(raw_smp_processor_id()) && !(flags & CON_ANYTIME))
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+ return false;
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+
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+ return true;
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+}
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+
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#else
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#define PRINTK_PREFIX_MAX 0
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@@ -99,6 +129,8 @@ static inline bool nbcon_alloc(struct co
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static inline void nbcon_init(struct console *con) { }
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static inline void nbcon_free(struct console *con) { }
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+static inline bool console_is_usable(struct console *con) { return false; }
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+
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#endif /* CONFIG_PRINTK */
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extern struct printk_buffers printk_shared_pbufs;
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--- a/kernel/printk/printk.c
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+++ b/kernel/printk/printk.c
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@@ -2695,36 +2695,6 @@ int is_console_locked(void)
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}
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EXPORT_SYMBOL(is_console_locked);
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-/*
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- * Check if the given console is currently capable and allowed to print
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- * records.
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- *
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- * Requires the console_srcu_read_lock.
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- */
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-static inline bool console_is_usable(struct console *con)
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-{
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- short flags = console_srcu_read_flags(con);
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-
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- if (!(flags & CON_ENABLED))
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- return false;
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-
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- if ((flags & CON_SUSPENDED))
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- return false;
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-
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- if (!con->write)
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- return false;
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-
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- /*
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- * Console drivers may assume that per-cpu resources have been
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- * allocated. So unless they're explicitly marked as being able to
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- * cope (CON_ANYTIME) don't call them until this CPU is officially up.
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- */
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- if (!cpu_online(raw_smp_processor_id()) && !(flags & CON_ANYTIME))
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- return false;
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-
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- return true;
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-}
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-
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static void __console_unlock(void)
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{
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console_locked = 0;
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