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| author |   Thomas Gleixner <tglx@linutronix.de> | 2020-11-03 10:27:34 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-11-06 23:14:59 +0100 |
| commit | 13f876ba77ebd5125799bb042201f22cf73df154 (patch) | |
| tree | 7c7ba6f60ac6c87617c25c16a08cc68909128f75 /mm/highmem.c | |
| parent | Documentation/io-mapping: Remove outdated blurb (diff) | |
| download | linux-dev-13f876ba77ebd5125799bb042201f22cf73df154.tar.xz linux-dev-13f876ba77ebd5125799bb042201f22cf73df154.zip | |
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/highmem.c')
| -rw-r--r-- | mm/highmem.c | 11 |
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(); |