diff options
Diffstat (limited to 'features/rt/printk-convert-syslog_lock-to-spin_lock.patch')
| -rw-r--r-- | features/rt/printk-convert-syslog_lock-to-spin_lock.patch | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/features/rt/printk-convert-syslog_lock-to-spin_lock.patch b/features/rt/printk-convert-syslog_lock-to-spin_lock.patch new file mode 100644 index 00000000..611e45b5 --- /dev/null +++ b/features/rt/printk-convert-syslog_lock-to-spin_lock.patch @@ -0,0 +1,118 @@ +From 3fe6df2a782687f96ec4e6eb1dcaa4b9dcc018ef Mon Sep 17 00:00:00 2001 +From: John Ogness <john.ogness@linutronix.de> +Date: Thu, 18 Feb 2021 17:37:41 +0100 +Subject: [PATCH 023/191] printk: convert @syslog_lock to spin_lock + +Signed-off-by: John Ogness <john.ogness@linutronix.de> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + kernel/printk/printk.c | 30 +++++++++++++++--------------- + 1 file changed, 15 insertions(+), 15 deletions(-) + +diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c +index 274d4ef05a90..3e0b9bf28e12 100644 +--- a/kernel/printk/printk.c ++++ b/kernel/printk/printk.c +@@ -356,7 +356,7 @@ enum log_flags { + }; + + /* syslog_lock protects syslog_* variables and write access to clear_seq. */ +-static DEFINE_RAW_SPINLOCK(syslog_lock); ++static DEFINE_SPINLOCK(syslog_lock); + + #ifdef CONFIG_PRINTK + DECLARE_WAIT_QUEUE_HEAD(log_wait); +@@ -1479,9 +1479,9 @@ static int syslog_print(char __user *buf, int size) + size_t n; + size_t skip; + +- raw_spin_lock_irq(&syslog_lock); ++ spin_lock_irq(&syslog_lock); + if (!prb_read_valid(prb, syslog_seq, &r)) { +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + break; + } + if (r.info->seq != syslog_seq) { +@@ -1510,7 +1510,7 @@ static int syslog_print(char __user *buf, int size) + syslog_partial += n; + } else + n = 0; +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + + if (!n) + break; +@@ -1574,9 +1574,9 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + } + + if (clear) { +- raw_spin_lock_irq(&syslog_lock); ++ spin_lock_irq(&syslog_lock); + latched_seq_write(&clear_seq, seq); +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + } + + kfree(text); +@@ -1585,9 +1585,9 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + + static void syslog_clear(void) + { +- raw_spin_lock_irq(&syslog_lock); ++ spin_lock_irq(&syslog_lock); + latched_seq_write(&clear_seq, prb_next_seq(prb)); +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + } + + /* Return a consistent copy of @syslog_seq. */ +@@ -1595,9 +1595,9 @@ static u64 read_syslog_seq_irq(void) + { + u64 seq; + +- raw_spin_lock_irq(&syslog_lock); ++ spin_lock_irq(&syslog_lock); + seq = syslog_seq; +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + + return seq; + } +@@ -1675,10 +1675,10 @@ int do_syslog(int type, char __user *buf, int len, int source) + break; + /* Number of chars in the log buffer */ + case SYSLOG_ACTION_SIZE_UNREAD: +- raw_spin_lock_irq(&syslog_lock); ++ spin_lock_irq(&syslog_lock); + if (!prb_read_valid_info(prb, syslog_seq, &info, NULL)) { + /* No unread messages. */ +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + return 0; + } + if (info.seq != syslog_seq) { +@@ -1706,7 +1706,7 @@ int do_syslog(int type, char __user *buf, int len, int source) + } + error -= syslog_partial; + } +- raw_spin_unlock_irq(&syslog_lock); ++ spin_unlock_irq(&syslog_lock); + break; + /* Size of the log buffer */ + case SYSLOG_ACTION_SIZE_BUFFER: +@@ -3001,9 +3001,9 @@ void register_console(struct console *newcon) + exclusive_console_stop_seq = console_seq; + + /* Get a consistent copy of @syslog_seq. */ +- raw_spin_lock_irqsave(&syslog_lock, flags); ++ spin_lock_irqsave(&syslog_lock, flags); + console_seq = syslog_seq; +- raw_spin_unlock_irqrestore(&syslog_lock, flags); ++ spin_unlock_irqrestore(&syslog_lock, flags); + } + console_unlock(); + console_sysfs_notify(); +-- +2.19.1 + |