Merge tag 'printk-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

Pull printk updates from Petr Mladek:

 - Use no_printk() instead of "if (0) printk()" constructs to avoid
   generating printk index for messages disabled at compile time

 - Remove deprecated strncpy/strcpy from printk.c

 - Remove redundant CONFIG_BASE_FULL in favor of CONFIG_BASE_SMALL

* tag 'printk-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  printk: cleanup deprecated uses of strncpy/strcpy
  printk: Remove redundant CONFIG_BASE_FULL
  printk: Change type of CONFIG_BASE_SMALL to bool
  printk: Fix LOG_CPU_MAX_BUF_SHIFT when BASE_SMALL is enabled
  ceph: Use no_printk() helper
  dyndbg: Use *no_printk() helpers
  dev_printk: Add and use dev_no_printk()
  printk: Let no_printk() use _printk()

36 files changed, 73 insertions, 83 deletions

diff --git a/arch/arm/configs/collie_defconfig b/arch/arm/configs/collie_defconfig
index 01b5a5a73f03..42cb1c854118 100644
--- a/arch/arm/configs/collie_defconfig
+++ b/arch/arm/configs/collie_defconfig
@@ -3,7 +3,7 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 CONFIG_EXPERT=y
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_EPOLL is not set
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
diff --git a/arch/arm/configs/keystone_defconfig b/arch/arm/configs/keystone_defconfig
index 59c4835ffc97..c1291ca290b2 100644
--- a/arch/arm/configs/keystone_defconfig
+++ b/arch/arm/configs/keystone_defconfig
@@ -12,7 +12,7 @@ CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_EXPERT=y
 CONFIG_PROFILING=y
diff --git a/arch/arm/configs/lpc18xx_defconfig b/arch/arm/configs/lpc18xx_defconfig
index d169da9b2824..f55c231e0870 100644
--- a/arch/arm/configs/lpc18xx_defconfig
+++ b/arch/arm/configs/lpc18xx_defconfig
@@ -8,7 +8,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_RD_LZ4 is not set
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_UID16 is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
diff --git a/arch/arm/configs/moxart_defconfig b/arch/arm/configs/moxart_defconfig
index 1d41e73f4903..34d079e03b3c 100644
--- a/arch/arm/configs/moxart_defconfig
+++ b/arch/arm/configs/moxart_defconfig
@@ -6,7 +6,7 @@ CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_EXPERT=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_SIGNALFD is not set
 # CONFIG_TIMERFD is not set
 # CONFIG_EVENTFD is not set
diff --git a/arch/arm/configs/mps2_defconfig b/arch/arm/configs/mps2_defconfig
index 3ed73f184d83..e995e50537ef 100644
--- a/arch/arm/configs/mps2_defconfig
+++ b/arch/arm/configs/mps2_defconfig
@@ -5,7 +5,7 @@ CONFIG_LOG_BUF_SHIFT=16
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_EXPERT=y
 # CONFIG_UID16 is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
diff --git a/arch/arm/configs/omap1_defconfig b/arch/arm/configs/omap1_defconfig
index 729ea8157e2a..025b595dd837 100644
--- a/arch/arm/configs/omap1_defconfig
+++ b/arch/arm/configs/omap1_defconfig
@@ -9,7 +9,7 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_EXPERT=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_SHMEM is not set
 # CONFIG_KALLSYMS is not set
 CONFIG_PROFILING=y
diff --git a/arch/arm/configs/stm32_defconfig b/arch/arm/configs/stm32_defconfig
index b9fe3fbed5ae..3baec075d1ef 100644
--- a/arch/arm/configs/stm32_defconfig
+++ b/arch/arm/configs/stm32_defconfig
@@ -6,7 +6,7 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_EXPERT=y
 # CONFIG_UID16 is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
diff --git a/arch/microblaze/configs/mmu_defconfig b/arch/microblaze/configs/mmu_defconfig
index 4da7bc4ac4a3..176314f3c9aa 100644
--- a/arch/microblaze/configs/mmu_defconfig
+++ b/arch/microblaze/configs/mmu_defconfig
@@ -4,7 +4,7 @@ CONFIG_AUDIT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_EXPERT=y
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR=1
 CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR=1
diff --git a/arch/mips/configs/rs90_defconfig b/arch/mips/configs/rs90_defconfig
index 4b9e36d6400e..a53dd66e9b86 100644
--- a/arch/mips/configs/rs90_defconfig
+++ b/arch/mips/configs/rs90_defconfig
@@ -9,7 +9,7 @@ CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y
 # CONFIG_SGETMASK_SYSCALL is not set
 # CONFIG_SYSFS_SYSCALL is not set
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_TIMERFD is not set
 # CONFIG_AIO is not set
 # CONFIG_IO_URING is not set
diff --git a/arch/powerpc/configs/adder875_defconfig b/arch/powerpc/configs/adder875_defconfig
index 7f35d5bc1229..97f4d4851735 100644
--- a/arch/powerpc/configs/adder875_defconfig
+++ b/arch/powerpc/configs/adder875_defconfig
@@ -4,7 +4,7 @@ CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_BLK_DEV_BSG is not set
diff --git a/arch/powerpc/configs/ep88xc_defconfig b/arch/powerpc/configs/ep88xc_defconfig
index a98ef6a4abef..50cc59eb36cf 100644
--- a/arch/powerpc/configs/ep88xc_defconfig
+++ b/arch/powerpc/configs/ep88xc_defconfig
@@ -6,7 +6,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_BLK_DEV_BSG is not set
diff --git a/arch/powerpc/configs/mpc866_ads_defconfig b/arch/powerpc/configs/mpc866_ads_defconfig
index 5c56d36cdfc5..6f449411abf7 100644
--- a/arch/powerpc/configs/mpc866_ads_defconfig
+++ b/arch/powerpc/configs/mpc866_ads_defconfig
@@ -6,7 +6,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
 # CONFIG_BUG is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_EPOLL is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_BLK_DEV_BSG is not set
diff --git a/arch/powerpc/configs/mpc885_ads_defconfig b/arch/powerpc/configs/mpc885_ads_defconfig
index 56b876e418e9..77306be62e9e 100644
--- a/arch/powerpc/configs/mpc885_ads_defconfig
+++ b/arch/powerpc/configs/mpc885_ads_defconfig
@@ -7,7 +7,7 @@ CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
diff --git a/arch/powerpc/configs/tqm8xx_defconfig b/arch/powerpc/configs/tqm8xx_defconfig
index 083c2e57520a..383c0966e92f 100644
--- a/arch/powerpc/configs/tqm8xx_defconfig
+++ b/arch/powerpc/configs/tqm8xx_defconfig
@@ -6,7 +6,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
 CONFIG_MODULES=y
diff --git a/arch/riscv/configs/nommu_k210_defconfig b/arch/riscv/configs/nommu_k210_defconfig
index 2552e78074a3..af9601da4643 100644
--- a/arch/riscv/configs/nommu_k210_defconfig
+++ b/arch/riscv/configs/nommu_k210_defconfig
@@ -11,7 +11,7 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_SYSFS_SYSCALL is not set
 # CONFIG_FHANDLE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
diff --git a/arch/riscv/configs/nommu_k210_sdcard_defconfig b/arch/riscv/configs/nommu_k210_sdcard_defconfig
index 8f67fb830585..dd460c649152 100644
--- a/arch/riscv/configs/nommu_k210_sdcard_defconfig
+++ b/arch/riscv/configs/nommu_k210_sdcard_defconfig
@@ -3,7 +3,7 @@ CONFIG_LOG_BUF_SHIFT=13
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_SYSFS_SYSCALL is not set
 # CONFIG_FHANDLE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
diff --git a/arch/riscv/configs/nommu_virt_defconfig b/arch/riscv/configs/nommu_virt_defconfig
index de8143d1f738..d4b03dc3c2c0 100644
--- a/arch/riscv/configs/nommu_virt_defconfig
+++ b/arch/riscv/configs/nommu_virt_defconfig
@@ -10,7 +10,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_EXPERT=y
 # CONFIG_SYSFS_SYSCALL is not set
 # CONFIG_FHANDLE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
 # CONFIG_TIMERFD is not set
diff --git a/arch/sh/configs/edosk7705_defconfig b/arch/sh/configs/edosk7705_defconfig
index 9ee35269bee2..ab3bf72264df 100644
--- a/arch/sh/configs/edosk7705_defconfig
+++ b/arch/sh/configs/edosk7705_defconfig
@@ -6,7 +6,7 @@
 # CONFIG_PRINTK is not set
 # CONFIG_BUG is not set
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SIGNALFD is not set
diff --git a/arch/sh/configs/se7619_defconfig b/arch/sh/configs/se7619_defconfig
index 14d0f5ead502..4765966fec99 100644
--- a/arch/sh/configs/se7619_defconfig
+++ b/arch/sh/configs/se7619_defconfig
@@ -4,7 +4,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_KALLSYMS is not set
 # CONFIG_HOTPLUG is not set
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
diff --git a/arch/sh/configs/se7712_defconfig b/arch/sh/configs/se7712_defconfig
index dc854293da43..20f07aee5bde 100644
--- a/arch/sh/configs/se7712_defconfig
+++ b/arch/sh/configs/se7712_defconfig
@@ -7,7 +7,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 CONFIG_KALLSYMS_ALL=y
 # CONFIG_BUG is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_SHMEM is not set
 CONFIG_MODULES=y
 # CONFIG_BLK_DEV_BSG is not set
diff --git a/arch/sh/configs/se7721_defconfig b/arch/sh/configs/se7721_defconfig
index c891945b8a90..00862d3c030d 100644
--- a/arch/sh/configs/se7721_defconfig
+++ b/arch/sh/configs/se7721_defconfig
@@ -7,7 +7,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 CONFIG_KALLSYMS_ALL=y
 # CONFIG_BUG is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_SHMEM is not set
 CONFIG_MODULES=y
 # CONFIG_BLK_DEV_BSG is not set
diff --git a/arch/sh/configs/shmin_defconfig b/arch/sh/configs/shmin_defconfig
index e078b193a78a..bfeb004f130e 100644
--- a/arch/sh/configs/shmin_defconfig
+++ b/arch/sh/configs/shmin_defconfig
@@ -5,7 +5,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_HOTPLUG is not set
 # CONFIG_BUG is not set
 # CONFIG_ELF_CORE is not set
-# CONFIG_BASE_FULL is not set
+CONFIG_BASE_SMALL=y
 # CONFIG_FUTEX is not set
 # CONFIG_EPOLL is not set
 # CONFIG_SHMEM is not set
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index c72c7ff78fcd..d593e52e6635 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -16,10 +16,10 @@ extern int pic_mode;
  * Summit or generic (i.e. installer) kernels need lots of bus entries.
  * Maximum 256 PCI busses, plus 1 ISA bus in each of 4 cabinets.
  */
-#if CONFIG_BASE_SMALL == 0
-# define MAX_MP_BUSSES		260
-#else
+#ifdef CONFIG_BASE_SMALL
 # define MAX_MP_BUSSES		32
+#else
+# define MAX_MP_BUSSES		260
 #endif
 
 #define MAX_IRQ_SOURCES		256
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index 67e2cb7c96ee..da33c6c4691c 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -51,7 +51,7 @@
 #include <asm/unaligned.h>
 
 #define HEADER_SIZE	4u
-#define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
+#define CON_BUF_SIZE (IS_ENABLED(CONFIG_BASE_SMALL) ? 256 : PAGE_SIZE)
 
 /*
  * Our minor space:
diff --git a/include/linux/ceph/ceph_debug.h b/include/linux/ceph/ceph_debug.h
index 11a92a946016..5f904591fa5f 100644
--- a/include/linux/ceph/ceph_debug.h
+++ b/include/linux/ceph/ceph_debug.h
@@ -27,17 +27,13 @@
 		 ##__VA_ARGS__)
 # else
 /* faux printk call just to see any compiler warnings. */
-#  define dout(fmt, ...)	do {				\
-		if (0)						\
-			printk(KERN_DEBUG fmt, ##__VA_ARGS__);	\
-	} while (0)
-#  define doutc(client, fmt, ...)	do {			\
-		if (0)						\
-			printk(KERN_DEBUG "[%pU %llu] " fmt,	\
-			&client->fsid,				\
-			client->monc.auth->global_id,		\
-			##__VA_ARGS__);				\
-		} while (0)
+#  define dout(fmt, ...)					\
+		no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)
+#  define doutc(client, fmt, ...)				\
+		no_printk(KERN_DEBUG "[%pU %llu] " fmt,		\
+			  &client->fsid,			\
+			  client->monc.auth->global_id,		\
+			  ##__VA_ARGS__)
 # endif
 
 #else
diff --git a/include/linux/dev_printk.h b/include/linux/dev_printk.h
index 6bfe70decc9f..ae80a303c216 100644
--- a/include/linux/dev_printk.h
+++ b/include/linux/dev_printk.h
@@ -130,6 +130,16 @@ void _dev_info(const struct device *dev, const char *fmt, ...)
 	})
 
 /*
+ * Dummy dev_printk for disabled debugging statements to use whilst maintaining
+ * gcc's format checking.
+ */
+#define dev_no_printk(level, dev, fmt, ...)				\
+	({								\
+		if (0)							\
+			_dev_printk(level, dev, fmt, ##__VA_ARGS__);	\
+	})
+
+/*
  * #defines for all the dev_<level> macros to prefix with whatever
  * possible use of #define dev_fmt(fmt) ...
  */
@@ -158,10 +168,7 @@ void _dev_info(const struct device *dev, const char *fmt, ...)
 	dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
 #else
 #define dev_dbg(dev, fmt, ...)						\
-({									\
-	if (0)								\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-})
+	dev_no_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
 #endif
 
 #ifdef CONFIG_PRINTK
@@ -247,20 +254,14 @@ do {									\
 } while (0)
 #else
 #define dev_dbg_ratelimited(dev, fmt, ...)				\
-do {									\
-	if (0)								\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-} while (0)
+	dev_no_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
 #endif
 
 #ifdef VERBOSE_DEBUG
 #define dev_vdbg	dev_dbg
 #else
 #define dev_vdbg(dev, fmt, ...)						\
-({									\
-	if (0)								\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-})
+	dev_no_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
 #endif
 
 /*
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index 4fcbf4d4fd0a..ff44ec346162 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -305,9 +305,9 @@ void __dynamic_ibdev_dbg(struct _ddebug *descriptor,
 #define DYNAMIC_DEBUG_BRANCH(descriptor) false
 
 #define dynamic_pr_debug(fmt, ...)					\
-	do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
+	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #define dynamic_dev_dbg(dev, fmt, ...)					\
-	do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0)
+	dev_no_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__)
 #define dynamic_hex_dump(prefix_str, prefix_type, rowsize,		\
 			 groupsize, buf, len, ascii)			\
 	do { if (0)							\
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 955e31860095..dbbd202b1cb3 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -71,7 +71,7 @@ extern void console_verbose(void);
 
 /* strlen("ratelimit") + 1 */
 #define DEVKMSG_STR_MAX_SIZE 10
-extern char devkmsg_log_str[];
+extern char devkmsg_log_str[DEVKMSG_STR_MAX_SIZE];
 struct ctl_table;
 
 extern int suppress_printk;
@@ -126,7 +126,7 @@ struct va_format {
 #define no_printk(fmt, ...)				\
 ({							\
 	if (0)						\
-		printk(fmt, ##__VA_ARGS__);		\
+		_printk(fmt, ##__VA_ARGS__);		\
 	0;						\
 })
 
diff --git a/include/linux/threads.h b/include/linux/threads.h
index c34173e6c5f1..1674a471b0b4 100644
--- a/include/linux/threads.h
+++ b/include/linux/threads.h
@@ -25,13 +25,13 @@
 /*
  * This controls the default maximum pid allocated to a process
  */
-#define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000)
+#define PID_MAX_DEFAULT (IS_ENABLED(CONFIG_BASE_SMALL) ? 0x1000 : 0x8000)
 
 /*
  * A maximum of 4 million PIDs should be enough for a while.
  * [NOTE: PID/TIDs are limited to 2^30 ~= 1 billion, see FUTEX_TID_MASK.]
  */
-#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
+#define PID_MAX_LIMIT (IS_ENABLED(CONFIG_BASE_SMALL) ? PAGE_SIZE * 8 : \
 	(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
 
 /*
diff --git a/include/linux/udp.h b/include/linux/udp.h
index e398e1dbd2d3..3eb3f2b9a2a0 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -24,7 +24,7 @@ static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
 }
 
 #define UDP_HTABLE_SIZE_MIN_PERNET	128
-#define UDP_HTABLE_SIZE_MIN		(CONFIG_BASE_SMALL ? 128 : 256)
+#define UDP_HTABLE_SIZE_MIN		(IS_ENABLED(CONFIG_BASE_SMALL) ? 128 : 256)
 #define UDP_HTABLE_SIZE_MAX		65536
 
 static inline u32 udp_hashfn(const struct net *net, u32 num, u32 mask)
diff --git a/include/linux/xarray.h b/include/linux/xarray.h
index cb571dfcf4b1..3f81ee5f9fb9 100644
--- a/include/linux/xarray.h
+++ b/include/linux/xarray.h
@@ -1141,7 +1141,7 @@ static inline void xa_release(struct xarray *xa, unsigned long index)
  * doubled the number of slots per node, we'd get only 3 nodes per 4kB page.
  */
 #ifndef XA_CHUNK_SHIFT
-#define XA_CHUNK_SHIFT		(CONFIG_BASE_SMALL ? 4 : 6)
+#define XA_CHUNK_SHIFT		(IS_ENABLED(CONFIG_BASE_SMALL) ? 4 : 6)
 #endif
 #define XA_CHUNK_SIZE		(1UL << XA_CHUNK_SHIFT)
 #define XA_CHUNK_MASK		(XA_CHUNK_SIZE - 1)
diff --git a/init/Kconfig b/init/Kconfig
index 132a1f4d6b65..25f6caeb1491 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -743,8 +743,8 @@ config LOG_CPU_MAX_BUF_SHIFT
 	int "CPU kernel log buffer size contribution (13 => 8 KB, 17 => 128KB)"
 	depends on SMP
 	range 0 21
-	default 12 if !BASE_SMALL
 	default 0 if BASE_SMALL
+	default 12
 	depends on PRINTK
 	help
 	  This option allows to increase the default ring buffer size
@@ -1585,11 +1585,10 @@ config PCSPKR_PLATFORM
 	  This option allows to disable the internal PC-Speaker
 	  support, saving some memory.
 
-config BASE_FULL
-	default y
-	bool "Enable full-sized data structures for core" if EXPERT
+config BASE_SMALL
+	bool "Enable smaller-sized data structures for core" if EXPERT
 	help
-	  Disabling this option reduces the size of miscellaneous core
+	  Enabling this option reduces the size of miscellaneous core
 	  kernel data structures. This saves memory on small machines,
 	  but may reduce performance.
 
@@ -1944,11 +1943,6 @@ config RT_MUTEXES
 	bool
 	default y if PREEMPT_RT
 
-config BASE_SMALL
-	int
-	default 0 if BASE_FULL
-	default 1 if !BASE_FULL
-
 config MODULE_SIG_FORMAT
 	def_bool n
 	select SYSTEM_DATA_VERIFICATION
diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 1e78ef24321e..06a1f091be81 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -1150,7 +1150,7 @@ static int __init futex_init(void)
 	unsigned int futex_shift;
 	unsigned long i;
 
-#if CONFIG_BASE_SMALL
+#ifdef CONFIG_BASE_SMALL
 	futex_hashsize = 16;
 #else
 	futex_hashsize = roundup_pow_of_two(256 * num_possible_cpus());
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index adf99c05adca..3160d287d4cf 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -178,9 +178,9 @@ static int __init control_devkmsg(char *str)
 	 * Set sysctl string accordingly:
 	 */
 	if (devkmsg_log == DEVKMSG_LOG_MASK_ON)
-		strcpy(devkmsg_log_str, "on");
+		strscpy(devkmsg_log_str, "on");
 	else if (devkmsg_log == DEVKMSG_LOG_MASK_OFF)
-		strcpy(devkmsg_log_str, "off");
+		strscpy(devkmsg_log_str, "off");
 	/* else "ratelimit" which is set by default. */
 
 	/*
@@ -209,7 +209,7 @@ int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
 			return -EINVAL;
 
 		old = devkmsg_log;
-		strncpy(old_str, devkmsg_log_str, DEVKMSG_STR_MAX_SIZE);
+		strscpy(old_str, devkmsg_log_str);
 	}
 
 	err = proc_dostring(table, write, buffer, lenp, ppos);
@@ -227,7 +227,7 @@ int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
 
 			/* ... and restore old setting. */
 			devkmsg_log = old;
-			strncpy(devkmsg_log_str, old_str, DEVKMSG_STR_MAX_SIZE);
+			strscpy(devkmsg_log_str, old_str);
 
 			return -EINVAL;
 		}
@@ -2506,22 +2506,22 @@ static int __init console_setup(char *str)
 	/*
 	 * Decode str into name, index, options.
 	 */
-	if (str[0] >= '0' && str[0] <= '9') {
-		strcpy(buf, "ttyS");
-		strncpy(buf + 4, str, sizeof(buf) - 5);
-	} else {
-		strncpy(buf, str, sizeof(buf) - 1);
-	}
-	buf[sizeof(buf) - 1] = 0;
+	if (isdigit(str[0]))
+		scnprintf(buf, sizeof(buf), "ttyS%s", str);
+	else
+		strscpy(buf, str);
+
 	options = strchr(str, ',');
 	if (options)
 		*(options++) = 0;
+
 #ifdef __sparc__
 	if (!strcmp(str, "ttya"))
-		strcpy(buf, "ttyS0");
+		strscpy(buf, "ttyS0");
 	if (!strcmp(str, "ttyb"))
-		strcpy(buf, "ttyS1");
+		strscpy(buf, "ttyS1");
 #endif
+
 	for (s = buf; *s; s++)
 		if (isdigit(*s) || *s == ',')
 			break;
diff --git a/kernel/user.c b/kernel/user.c
index 03cedc366dc9..aa1162deafe4 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -88,7 +88,7 @@ EXPORT_SYMBOL_GPL(init_user_ns);
  * when changing user ID's (ie setuid() and friends).
  */
 
-#define UIDHASH_BITS	(CONFIG_BASE_SMALL ? 3 : 7)
+#define UIDHASH_BITS	(IS_ENABLED(CONFIG_BASE_SMALL) ? 3 : 7)
 #define UIDHASH_SZ	(1 << UIDHASH_BITS)
 #define UIDHASH_MASK		(UIDHASH_SZ - 1)
 #define __uidhashfn(uid)	(((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)
diff --git a/tools/testing/selftests/wireguard/qemu/kernel.config b/tools/testing/selftests/wireguard/qemu/kernel.config
index 507555714b1d..f314d3789f17 100644
--- a/tools/testing/selftests/wireguard/qemu/kernel.config
+++ b/tools/testing/selftests/wireguard/qemu/kernel.config
@@ -41,7 +41,6 @@ CONFIG_KALLSYMS=y
 CONFIG_BUG=y
 CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
 CONFIG_JUMP_LABEL=y
-CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_SHMEM=y
 CONFIG_SLUB=y