Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c
index 6cfc5a0..2e9e3ed 100644
--- a/kernel/printk/printk_safe.c
+++ b/kernel/printk/printk_safe.c
@@ -6,10 +6,12 @@
#include <linux/preempt.h>
#include <linux/spinlock.h>
#include <linux/debug_locks.h>
+#include <linux/kdb.h>
#include <linux/smp.h>
#include <linux/cpumask.h>
#include <linux/irq_work.h>
#include <linux/printk.h>
+#include <linux/kprobes.h>
#include "internal.h"
@@ -20,7 +22,7 @@
* is later flushed into the main ring buffer via IRQ work.
*
* The alternative implementation is chosen transparently
- * by examinig current printk() context mask stored in @printk_context
+ * by examining current printk() context mask stored in @printk_context
* per-CPU variable.
*
* The implementation allows to flush the strings also from another CPU.
@@ -301,14 +303,14 @@
return printk_safe_log_store(s, fmt, args);
}
-void notrace printk_nmi_enter(void)
+void noinstr printk_nmi_enter(void)
{
- this_cpu_or(printk_context, PRINTK_NMI_CONTEXT_MASK);
+ this_cpu_add(printk_context, PRINTK_NMI_CONTEXT_OFFSET);
}
-void notrace printk_nmi_exit(void)
+void noinstr printk_nmi_exit(void)
{
- this_cpu_and(printk_context, ~PRINTK_NMI_CONTEXT_MASK);
+ this_cpu_sub(printk_context, PRINTK_NMI_CONTEXT_OFFSET);
}
/*
@@ -367,6 +369,12 @@
__printf(1, 0) int vprintk_func(const char *fmt, va_list args)
{
+#ifdef CONFIG_KGDB_KDB
+ /* Allow to pass printk() to kdb but avoid a recursion. */
+ if (unlikely(kdb_trap_printk && kdb_printf_cpu < 0))
+ return vkdb_printf(KDB_MSGSRC_PRINTK, fmt, args);
+#endif
+
/*
* Try to use the main logbuf even in NMI. But avoid calling console
* drivers that might have their own locks.
@@ -375,7 +383,7 @@
raw_spin_trylock(&logbuf_lock)) {
int len;
- len = vprintk_store(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
+ len = vprintk_store(0, LOGLEVEL_DEFAULT, NULL, fmt, args);
raw_spin_unlock(&logbuf_lock);
defer_console_output();
return len;