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author | 2020-06-04 16:47:34 -0700 | |
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committer | 2020-06-04 19:06:22 -0700 | |
commit | e23c45976f82ac789469c37e4d5a72ea2ce30bba (patch) | |
tree | e4cb3d96b5e63e6a8718dad2c5462b565592215d /include/linux/highmem.h | |
parent | arch/kmap: remove redundant arch specific kmaps (diff) | |
download | linux-e23c45976f82ac789469c37e4d5a72ea2ce30bba.tar.gz linux-e23c45976f82ac789469c37e4d5a72ea2ce30bba.tar.bz2 linux-e23c45976f82ac789469c37e4d5a72ea2ce30bba.zip |
arch/kunmap: remove duplicate kunmap implementations
All architectures do exactly the same thing for kunmap(); remove all the
duplicate definitions and lift the call to the core.
This also has the benefit of changing kmap_unmap() on a number of
architectures to be an inline call rather than an actual function.
[akpm@linux-foundation.org: fix CONFIG_HIGHMEM=n build on various architectures]
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christian König <christian.koenig@amd.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200507150004.1423069-5-ira.weiny@intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/highmem.h')
-rw-r--r-- | include/linux/highmem.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/highmem.h b/include/linux/highmem.h index fc3adc51254a..216a647ed7db 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -52,6 +52,16 @@ static inline void *kmap(struct page *page) return addr; } +void kunmap_high(struct page *page); + +static inline void kunmap(struct page *page) +{ + might_sleep(); + if (!PageHighMem(page)) + return; + kunmap_high(page); +} + /* declarations for linux/mm/highmem.c */ unsigned int nr_free_highpages(void); extern atomic_long_t _totalhigh_pages; @@ -102,6 +112,10 @@ static inline void *kmap(struct page *page) return page_address(page); } +static inline void kunmap_high(struct page *page) +{ +} + static inline void kunmap(struct page *page) { } |