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Subject[PATCH] Remove orphaned CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT
After 93d102f094be9beab28e5afb656c188b16a3793b "printk: remove safe buffers",
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT is no longer useful. Remove it.

This change is not eligible for stable@.

Please Reply-To-All.

Marc.

Signed-off-by: Marc Aurèle La France <tsi@tuyoix.net>

diff -aNpRruz -X /etc/diff.excludes linux-6.2.0/arch/powerpc/configs/microwatt_defconfig devel-6.2.0/arch/powerpc/configs/microwatt_defconfig
--- linux-6.2.0/arch/powerpc/configs/microwatt_defconfig 2023-02-19 15:24:22.000000000 -0700
+++ devel-6.2.0/arch/powerpc/configs/microwatt_defconfig 2023-02-20 21:39:39.057268798 -0700
@@ -4,7 +4,6 @@ CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT_VOLUNTARY=y
CONFIG_TICK_CPU_ACCOUNTING=y
CONFIG_LOG_BUF_SHIFT=16
-CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
CONFIG_CGROUPS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
diff -aNpRruz -X /etc/diff.excludes linux-6.2.0/arch/riscv/configs/nommu_k210_defconfig devel-6.2.0/arch/riscv/configs/nommu_k210_defconfig
--- linux-6.2.0/arch/riscv/configs/nommu_k210_defconfig 2023-02-19 15:24:22.000000000 -0700
+++ devel-6.2.0/arch/riscv/configs/nommu_k210_defconfig 2023-02-20 21:40:01.349181760 -0700
@@ -1,6 +1,5 @@
# CONFIG_CPU_ISOLATION is not set
CONFIG_LOG_BUF_SHIFT=13
-CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
CONFIG_BLK_DEV_INITRD=y
# CONFIG_RD_GZIP is not set
# CONFIG_RD_BZIP2 is not set
diff -aNpRruz -X /etc/diff.excludes linux-6.2.0/arch/riscv/configs/nommu_k210_sdcard_defconfig devel-6.2.0/arch/riscv/configs/nommu_k210_sdcard_defconfig
--- linux-6.2.0/arch/riscv/configs/nommu_k210_sdcard_defconfig 2023-02-19 15:24:22.000000000 -0700
+++ devel-6.2.0/arch/riscv/configs/nommu_k210_sdcard_defconfig 2023-02-20 21:39:46.721238871 -0700
@@ -1,6 +1,5 @@
# CONFIG_CPU_ISOLATION is not set
CONFIG_LOG_BUF_SHIFT=13
-CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
# CONFIG_SYSFS_SYSCALL is not set
# CONFIG_FHANDLE is not set
diff -aNpRruz -X /etc/diff.excludes linux-6.2.0/arch/riscv/configs/nommu_virt_defconfig devel-6.2.0/arch/riscv/configs/nommu_virt_defconfig
--- linux-6.2.0/arch/riscv/configs/nommu_virt_defconfig 2023-02-19 15:24:22.000000000 -0700
+++ devel-6.2.0/arch/riscv/configs/nommu_virt_defconfig 2023-02-20 21:39:55.329205262 -0700
@@ -1,6 +1,5 @@
# CONFIG_CPU_ISOLATION is not set
CONFIG_LOG_BUF_SHIFT=16
-CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
CONFIG_BLK_DEV_INITRD=y
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
diff -aNpRruz -X /etc/diff.excludes linux-6.2.0/init/Kconfig devel-6.2.0/init/Kconfig
--- linux-6.2.0/init/Kconfig 2023-02-19 15:24:22.000000000 -0700
+++ devel-6.2.0/init/Kconfig 2023-02-20 21:40:23.329095967 -0700
@@ -769,30 +769,6 @@ config LOG_CPU_MAX_BUF_SHIFT
13 => 8 KB for each CPU
12 => 4 KB for each CPU

-config PRINTK_SAFE_LOG_BUF_SHIFT
- int "Temporary per-CPU printk log buffer size (12 => 4KB, 13 => 8KB)"
- range 10 21
- default 13
- depends on PRINTK
- help
- Select the size of an alternate printk per-CPU buffer where messages
- printed from unsafe contexts are temporary stored. One example would
- be NMI messages, another one - printk recursion. The messages are
- copied to the main log buffer in a safe context to avoid a deadlock.
- The value defines the size as a power of 2.
-
- Those messages are rare and limited. The largest one is when
- a backtrace is printed. It usually fits into 4KB. Select
- 8KB if you want to be on the safe side.
-
- Examples:
- 17 => 128 KB for each CPU
- 16 => 64 KB for each CPU
- 15 => 32 KB for each CPU
- 14 => 16 KB for each CPU
- 13 => 8 KB for each CPU
- 12 => 4 KB for each CPU
-
config PRINTK_INDEX
bool "Printk indexing debugfs interface"
depends on PRINTK && DEBUG_FS
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