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From: Yoann Congal <yoann.congal@smile.fr>
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	Thomas Gleixner <tglx@linutronix.de>,
	Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
	Yoann Congal <yoann.congal@smile.fr>
Subject: [PATCH v3 2/2] printk: Remove redundant CONFIG_BASE_SMALL
Date: Mon,  5 Feb 2024 00:29:45 +0100
Message-Id: <20240204232945.1576403-3-yoann.congal@smile.fr>
In-Reply-To: <20240204232945.1576403-1-yoann.congal@smile.fr>
References: <20240204232945.1576403-1-yoann.congal@smile.fr>
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CONFIG_BASE_SMALL is currently a type int but is only used as a boolean
equivalent to !CONFIG_BASE_FULL.

So, remove it entirely and move every usage to !CONFIG_BASE_FULL:
Since CONFIG_BASE_FULL is a type bool config,
CONFIG_BASE_SMALL == 0 becomes  IS_ENABLED(CONFIG_BASE_FULL) and
CONFIG_BASE_SMALL != 0 becomes !IS_ENABLED(CONFIG_BASE_FULL).

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
---
 arch/x86/include/asm/mpspec.h | 2 +-
 drivers/tty/vt/vc_screen.c    | 2 +-
 include/linux/threads.h       | 6 +++---
 include/linux/udp.h           | 2 +-
 include/linux/xarray.h        | 2 +-
 init/Kconfig                  | 5 -----
 kernel/futex/core.c           | 6 +++---
 kernel/user.c                 | 2 +-
 8 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index 4b0f98a8d338d..44307fb37fa25 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -15,7 +15,7 @@ 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
+#ifdef CONFIG_BASE_FULL
 # define MAX_MP_BUSSES		260
 #else
 # define MAX_MP_BUSSES		32
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index 67e2cb7c96eec..d0e4fcd1bd8b5 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_FULL) ? PAGE_SIZE : 256)
 
 /*
  * Our minor space:
diff --git a/include/linux/threads.h b/include/linux/threads.h
index c34173e6c5f18..f0f7a8aaba77d 100644
--- a/include/linux/threads.h
+++ b/include/linux/threads.h
@@ -25,14 +25,14 @@
 /*
  * 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_FULL) ? 0x8000 : 0x1000)
 
 /*
  * 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 : \
-	(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
+#define PID_MAX_LIMIT (IS_ENABLED(CONFIG_BASE_FULL) ? \
+	(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT) : PAGE_SIZE * 8)
 
 /*
  * Define a minimum number of pids per cpu.  Heuristically based
diff --git a/include/linux/udp.h b/include/linux/udp.h
index d04188714dca1..ca8a172169019 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_FULL) ? 256 : 128)
 #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 cb571dfcf4b16..7e00e71c2d266 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_FULL) ? 6 : 4)
 #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 73efb76f38734..3c1654fc770b5 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1940,11 +1940,6 @@ 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 1e78ef24321e8..8488d3a23e2fd 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -1150,10 +1150,10 @@ static int __init futex_init(void)
 	unsigned int futex_shift;
 	unsigned long i;
 
-#if CONFIG_BASE_SMALL
-	futex_hashsize = 16;
-#else
+#ifdef CONFIG_BASE_FULL
 	futex_hashsize = roundup_pow_of_two(256 * num_possible_cpus());
+#else
+	futex_hashsize = 16;
 #endif
 
 	futex_queues = alloc_large_system_hash("futex", sizeof(*futex_queues),
diff --git a/kernel/user.c b/kernel/user.c
index 03cedc366dc9e..8f39fd0236fa0 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_FULL) ? 7 : 3)
 #define UIDHASH_SZ	(1 << UIDHASH_BITS)
 #define UIDHASH_MASK		(UIDHASH_SZ - 1)
 #define __uidhashfn(uid)	(((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)
-- 
2.39.2