summaryrefslogtreecommitdiff
path: root/mm
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2020-11-03 12:27:34 +0300
committerThomas Gleixner <tglx@linutronix.de>2020-11-07 01:14:59 +0300
commit13f876ba77ebd5125799bb042201f22cf73df154 (patch)
tree7c7ba6f60ac6c87617c25c16a08cc68909128f75 /mm
parent9bf6f7bab3bad4b30f108fca25aa5297dff0973f (diff)
downloadlinux-13f876ba77ebd5125799bb042201f22cf73df154.tar.xz
highmem: High implementation details and document API
Move the gory details of kmap & al into a private header and only document the interfaces which are usable by drivers. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linuxfoundation.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Andrew Morton <akpm@linux-foundation.org> Link: https://lore.kernel.org/r/20201103095858.827582066@linutronix.de
Diffstat (limited to 'mm')
-rw-r--r--mm/highmem.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/mm/highmem.c b/mm/highmem.c
index 499dfafd36b7..54bd233846c9 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -104,7 +104,7 @@ static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color)
atomic_long_t _totalhigh_pages __read_mostly;
EXPORT_SYMBOL(_totalhigh_pages);
-unsigned int nr_free_highpages (void)
+unsigned int __nr_free_highpages (void)
{
struct zone *zone;
unsigned int pages = 0;
@@ -141,7 +141,7 @@ pte_t * pkmap_page_table;
do { spin_unlock(&kmap_lock); (void)(flags); } while (0)
#endif
-struct page *kmap_to_page(void *vaddr)
+struct page *__kmap_to_page(void *vaddr)
{
unsigned long addr = (unsigned long)vaddr;
@@ -152,7 +152,7 @@ struct page *kmap_to_page(void *vaddr)
return virt_to_page(addr);
}
-EXPORT_SYMBOL(kmap_to_page);
+EXPORT_SYMBOL(__kmap_to_page);
static void flush_all_zero_pkmaps(void)
{
@@ -194,10 +194,7 @@ static void flush_all_zero_pkmaps(void)
flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
}
-/**
- * kmap_flush_unused - flush all unused kmap mappings in order to remove stray mappings
- */
-void kmap_flush_unused(void)
+void __kmap_flush_unused(void)
{
lock_kmap();
flush_all_zero_pkmaps();