The patch titled
Subject: printk/nmi: Remove the questionable CONFIG_NEED_PRINTK_NMI
has been added to the -mm tree. Its filename is
printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2.patch
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------------------------------------------------------
From: Petr Mladek <pmladek@xxxxxxxx>
Subject: printk/nmi: Remove the questionable CONFIG_NEED_PRINTK_NMI
The flag NEED_PRINTK_NMI was added because of Arm. It used the NMI safe
backtrace implementation on all Arm systems. But it did not have a real
NMI handling on CPU_V7M.
It seems that it causes more confusion than good. Let's use HAVE_NMI on
all arm systems and get rid of the problematic flag.
Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/Kconfig | 3 ---
arch/arm/Kconfig | 3 +--
init/Kconfig | 2 +-
3 files changed, 2 insertions(+), 6 deletions(-)
diff -puN arch/Kconfig~printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2 arch/Kconfig
--- a/arch/Kconfig~printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2
+++ a/arch/Kconfig
@@ -190,9 +190,6 @@ config HAVE_KPROBES_ON_FTRACE
config HAVE_NMI
bool
-config NEED_PRINTK_NMI
- bool
-
config HAVE_NMI_WATCHDOG
depends on HAVE_NMI
bool
diff -puN arch/arm/Kconfig~printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2 arch/arm/Kconfig
--- a/arch/arm/Kconfig~printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2
+++ a/arch/arm/Kconfig
@@ -64,8 +64,7 @@ config ARM
select HAVE_KRETPROBES if (HAVE_KPROBES)
select HAVE_MEMBLOCK
select HAVE_MOD_ARCH_SPECIFIC
- select HAVE_NMI if (!CPU_V7M)
- select NEED_PRINTK_NMI if (CPU_V7M)
+ select HAVE_NMI
select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
select HAVE_OPTPROBES if !THUMB2_KERNEL
select HAVE_PERF_EVENTS
diff -puN init/Kconfig~printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2 init/Kconfig
--- a/init/Kconfig~printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2
+++ a/init/Kconfig
@@ -1481,7 +1481,7 @@ config PRINTK
config PRINTK_NMI
def_bool y
depends on PRINTK
- depends on HAVE_NMI || NEED_PRINTK_NMI
+ depends on HAVE_NMI
config BUG
bool "BUG() support" if EXPERT
_
Patches currently in -mm which might be from pmladek@xxxxxxxx are
printk-nmi-generic-solution-for-safe-printk-in-nmi.patch
printk-nmi-generic-solution-for-safe-printk-in-nmi-v4.patch
printk-nmi-use-irq-work-only-when-ready.patch
printk-nmi-warn-when-some-message-has-been-lost-in-nmi-context.patch
printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable.patch
printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix.patch
printk-nmi-increase-the-size-of-nmi-buffer-and-make-it-configurable-fix-2.patch
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