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Message-Id: <20240212115500.2078463-12-max.kellermann@ionos.com>
Date: Mon, 12 Feb 2024 12:54:36 +0100
From: Max Kellermann <max.kellermann@...os.com>
To: linux-kernel@...r.kernel.org
Cc: Max Kellermann <max.kellermann@...os.com>
Subject: [PATCH v5 11/35] percpu_counter.h: move declarations to percpu_counter_types.h
By providing declarations in a lean header, we can reduce header
dependencies.
Signed-off-by: Max Kellermann <max.kellermann@...os.com>
---
include/linux/backing-dev-defs.h | 2 +-
include/linux/flex_proportions.h | 2 +-
include/linux/ipc_namespace.h | 2 +-
include/linux/mm_types.h | 3 ++-
include/linux/percpu_counter.h | 17 +------------
include/linux/percpu_counter_types.h | 37 ++++++++++++++++++++++++++++
include/linux/sched/user.h | 2 +-
include/linux/shmem_fs.h | 2 +-
kernel/user.c | 1 +
lib/flex_proportions.c | 1 +
10 files changed, 47 insertions(+), 22 deletions(-)
create mode 100644 include/linux/percpu_counter_types.h
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index ce5bda191ec5..9f2ef799cff4 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -6,7 +6,7 @@
#include <linux/radix-tree.h>
#include <linux/rbtree_types.h>
#include <linux/spinlock_types.h>
-#include <linux/percpu_counter.h>
+#include <linux/percpu_counter_types.h>
#include <linux/percpu-refcount.h>
#include <linux/flex_proportions.h>
#include <linux/timer_types.h>
diff --git a/include/linux/flex_proportions.h b/include/linux/flex_proportions.h
index 35204b64addf..df9017a61046 100644
--- a/include/linux/flex_proportions.h
+++ b/include/linux/flex_proportions.h
@@ -8,7 +8,7 @@
#ifndef _LINUX_FLEX_PROPORTIONS_H
#define _LINUX_FLEX_PROPORTIONS_H
-#include <linux/percpu_counter.h>
+#include <linux/percpu_counter_types.h>
#include <linux/spinlock_types.h>
#include <linux/seqlock_types.h>
#include <linux/gfp_types.h>
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index a0011b6cd5d1..7c758ab565fe 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -11,7 +11,7 @@
#include <linux/refcount.h>
#include <linux/rhashtable-types.h>
#include <linux/sysctl.h>
-#include <linux/percpu_counter.h>
+#include <linux/percpu_counter_types.h>
struct user_namespace;
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 54caee378e77..a88219770c82 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -19,7 +19,8 @@
#include <linux/page-flags-layout.h>
#include <linux/workqueue_types.h>
#include <linux/seqlock_types.h>
-#include <linux/percpu_counter.h>
+#include <linux/percpu_counter_types.h>
+#include <linux/percpu.h>
#include <asm/mmu.h>
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 91e3a527ceef..84f58b8b7856 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -7,26 +7,15 @@
* WARNING: these things are HUGE. 4 kbytes per counter on 32-way P4.
*/
-#include <linux/spinlock_types.h>
-#include <linux/list.h>
+#include <linux/percpu_counter_types.h>
#include <linux/threads.h>
#include <linux/percpu.h>
-#include <linux/types.h>
/* percpu_counter batch for local add or sub */
#define PERCPU_COUNTER_LOCAL_BATCH INT_MAX
#ifdef CONFIG_SMP
-struct percpu_counter {
- raw_spinlock_t lock;
- s64 count;
-#ifdef CONFIG_HOTPLUG_CPU
- struct list_head list; /* All percpu_counters are on a list */
-#endif
- s32 __percpu *counters;
-};
-
extern int percpu_counter_batch;
int __percpu_counter_init_many(struct percpu_counter *fbc, s64 amount,
@@ -133,10 +122,6 @@ static inline bool percpu_counter_initialized(struct percpu_counter *fbc)
#include <linux/irqflags.h> // for local_irq_save()
-struct percpu_counter {
- s64 count;
-};
-
static inline int percpu_counter_init_many(struct percpu_counter *fbc,
s64 amount, gfp_t gfp,
u32 nr_counters)
diff --git a/include/linux/percpu_counter_types.h b/include/linux/percpu_counter_types.h
new file mode 100644
index 000000000000..faccd9869a5a
--- /dev/null
+++ b/include/linux/percpu_counter_types.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_PERCPU_COUNTER_TYPES_H
+#define _LINUX_PERCPU_COUNTER_TYPES_H
+/*
+ * A simple "approximate counter" for use in ext2 and ext3 superblocks.
+ *
+ * WARNING: these things are HUGE. 4 kbytes per counter on 32-way P4.
+ */
+
+#include <linux/types.h>
+
+#ifdef CONFIG_SMP
+
+#include <linux/spinlock_types.h>
+
+#ifdef CONFIG_HOTPLUG_CPU
+#include <linux/list.h>
+#endif
+
+struct percpu_counter {
+ raw_spinlock_t lock;
+ s64 count;
+#ifdef CONFIG_HOTPLUG_CPU
+ struct list_head list; /* All percpu_counters are on a list */
+#endif
+ s32 __percpu *counters;
+};
+
+#else /* !CONFIG_SMP */
+
+struct percpu_counter {
+ s64 count;
+};
+
+#endif /* CONFIG_SMP */
+
+#endif /* _LINUX_PERCPU_COUNTER_TYPES_H */
diff --git a/include/linux/sched/user.h b/include/linux/sched/user.h
index 671ecee08d23..913da0aba05c 100644
--- a/include/linux/sched/user.h
+++ b/include/linux/sched/user.h
@@ -4,7 +4,7 @@
#include <linux/uidgid_types.h>
#include <linux/atomic.h>
-#include <linux/percpu_counter.h>
+#include <linux/percpu_counter_types.h>
#include <linux/refcount.h>
#include <linux/ratelimit_types.h>
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index 66828dfc6e74..56b11f1f82c5 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -6,7 +6,7 @@
#include <linux/swap.h>
#include <linux/mempolicy.h>
#include <linux/pagemap.h>
-#include <linux/percpu_counter.h>
+#include <linux/percpu_counter_types.h>
#include <linux/xattr.h>
#include <linux/fs_parser.h>
#include <linux/userfaultfd_k.h>
diff --git a/kernel/user.c b/kernel/user.c
index 28da71ea1e74..6c8b818419f8 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -22,6 +22,7 @@
#include <linux/proc_ns.h>
#include <linux/ratelimit.h>
#include <linux/uidgid.h>
+#include <linux/percpu_counter.h>
#if IS_ENABLED(CONFIG_BINFMT_MISC)
struct binfmt_misc init_binfmt_misc = {
diff --git a/lib/flex_proportions.c b/lib/flex_proportions.c
index 7749a48428e5..1d5e1e0bdbbe 100644
--- a/lib/flex_proportions.c
+++ b/lib/flex_proportions.c
@@ -36,6 +36,7 @@
#include <linux/flex_proportions.h>
#include <linux/log2.h>
#include <linux/math64.h>
+#include <linux/percpu_counter.h>
#include <linux/seqlock.h>
int fprop_global_init(struct fprop_global *p, gfp_t gfp)
--
2.39.2
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