[PATCH v3 1/8] mm: vmalloc: group declarations depending on CONFIG_MMU together

Mike Rapoport
2024-09-09T06:48:10Z

There are a couple of declarations that depend on CONFIG_MMU in
include/linux/vmalloc.h spread all over the file.

Group them all together to improve code readability.

No functional changes.

Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
---
include/linux/vmalloc.h | 60 +++++++++++++++++------------------------
1 file changed, 24 insertions(+), 36 deletions(-)

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index e4a631ec430b..c614631a31cb 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -134,12 +134,6 @@ extern void vm_unmap_ram(const void *mem, unsigned int count);
extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
extern void vm_unmap_aliases(void);

-#ifdef CONFIG_MMU
-extern unsigned long vmalloc_nr_pages(void);
-#else
-static inline unsigned long vmalloc_nr_pages(void) { return 0; }
-#endif
-
extern void *vmalloc_noprof(unsigned long size) __alloc_size(1);
#define vmalloc(...) alloc_hooks(vmalloc_noprof(__VA_ARGS__))

@@ -262,12 +256,29 @@ static inline bool is_vm_area_hugepages(const void *addr)
#endif
}

+/* for /proc/kcore */
+extern long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
+
+/*
+ * Internals. Don't use..
+ */
+extern __init void vm_area_add_early(struct vm_struct *vm);
+extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
+
+int register_vmap_purge_notifier(struct notifier_block *nb);
+int unregister_vmap_purge_notifier(struct notifier_block *nb);
+
#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+
+extern unsigned long vmalloc_nr_pages(void);
+
int vm_area_map_pages(struct vm_struct *area, unsigned long start,
unsigned long end, struct page **pages);
void vm_area_unmap_pages(struct vm_struct *area, unsigned long start,
unsigned long end);
void vunmap_range(unsigned long addr, unsigned long end);
+
static inline void set_vm_flush_reset_perms(void *addr)
{
struct vm_struct *vm = find_vm_area(addr);
@@ -275,24 +286,14 @@ static inline void set_vm_flush_reset_perms(void *addr)
if (vm)
vm->flags |= VM_FLUSH_RESET_PERMS;
}
+#else /* !CONFIG_MMU */
+#define VMALLOC_TOTAL 0UL

-#else
-static inline void set_vm_flush_reset_perms(void *addr)
-{
-}
-#endif
-
-/* for /proc/kcore */
-extern long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
-
-/*
- * Internals. Don't use..
- */
-extern __init void vm_area_add_early(struct vm_struct *vm);
-extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
+static inline unsigned long vmalloc_nr_pages(void) { return 0; }
+static inline void set_vm_flush_reset_perms(void *addr) {}
+#endif /* CONFIG_MMU */

-#ifdef CONFIG_SMP
-# ifdef CONFIG_MMU
+#if defined(CONFIG_MMU) && defined(CONFIG_SMP)
struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
const size_t *sizes, int nr_vms,
size_t align);
@@ -307,22 +308,9 @@ pcpu_get_vm_areas(const unsigned long *offsets,
return NULL;
}

-static inline void
-pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
-{
-}
-# endif
-#endif
-
-#ifdef CONFIG_MMU
-#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
-#else
-#define VMALLOC_TOTAL 0UL
+static inline void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) {}
#endif

-int register_vmap_purge_notifier(struct notifier_block *nb);
-int unregister_vmap_purge_notifier(struct notifier_block *nb);
-
#if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)
bool vmalloc_dump_obj(void *object);
#else
--
2.43.0