diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2021-01-07 13:46:11 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-03-08 14:18:46 -0800 |
| commit | 5bb1bb353cfe343fc3c84faf06f72ba309fde541 (patch) | |
| tree | 7a6f234b6247c3821fa2acb95c9a99e38ba24b65 /include/linux | |
| parent | a38fd8748464831584a19438cbb3082b5a2dab15 (diff) | |
mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels
The mem_dump_obj() functionality adds a few hundred bytes, which is a
small price to pay. Except on kernels built with CONFIG_PRINTK=n, in
which mem_dump_obj() messages will be suppressed. This commit therefore
makes mem_dump_obj() be a static inline empty function on kernels built
with CONFIG_PRINTK=n and excludes all of its support functions as well.
This avoids kernel bloat on systems that cannot use mem_dump_obj().
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: <linux-mm@kvack.org>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm.h | 4 | ||||
| -rw-r--r-- | include/linux/slab.h | 2 | ||||
| -rw-r--r-- | include/linux/vmalloc.h | 2 |
3 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 77e64e3eac80..89fca443e6f1 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3135,7 +3135,11 @@ unsigned long wp_shared_mapping_range(struct address_space *mapping, extern int sysctl_nr_trim_pages; +#ifdef CONFIG_PRINTK void mem_dump_obj(void *object); +#else +static inline void mem_dump_obj(void *object) {} +#endif #endif /* __KERNEL__ */ #endif /* _LINUX_MM_H */ diff --git a/include/linux/slab.h b/include/linux/slab.h index 7ae604076767..0c97d788762c 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -186,8 +186,10 @@ void kfree(const void *); void kfree_sensitive(const void *); size_t __ksize(const void *); size_t ksize(const void *); +#ifdef CONFIG_PRINTK bool kmem_valid_obj(void *object); void kmem_dump_obj(void *object); +#endif #ifdef CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR void __check_heap_object(const void *ptr, unsigned long n, struct page *page, diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index df92211cf771..3de7be6dd17c 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -241,7 +241,7 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) int register_vmap_purge_notifier(struct notifier_block *nb); int unregister_vmap_purge_notifier(struct notifier_block *nb); -#ifdef CONFIG_MMU +#if defined(CONFIG_MMU) && defined(CONFIG_PRINTK) bool vmalloc_dump_obj(void *object); #else static inline bool vmalloc_dump_obj(void *object) { return false; } |