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arch/kmap_atomic: consolidate duplicate code

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Every arch has the same code to ensure atomic operations and a check for
!HIGHMEM page.

Remove the duplicate code by defining a core kmap_atomic() which only
calls the arch specific kmap_atomic_high() when the page is high memory.

[akpm@linux-foundation.org: coding style fixes]
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/20200507150004.1423069-7-ira.weiny@intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ira Weiny
2020-06-04 16:47:42 -07:00
committed by Linus Torvalds
parent ee9bc5fdf5
commit 78b6d91ec7
21 changed files with 46 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
arch/nds32/mm/highmem.c
View File

@@ -10,18 +10,13 @@
#include <asm/fixmap.h>
#include <asm/tlbflush.h>
void *kmap_atomic(struct page *page)
void *kmap_atomic_high(struct page *page)
{
unsigned int idx;
unsigned long vaddr, pte;
int type;
pte_t *ptep;
preempt_disable();
pagefault_disable();
if (!PageHighMem(page))
return page_address(page);
type = kmap_atomic_idx_push();
idx = type + KM_TYPE_NR * smp_processor_id();
@@ -36,8 +31,7 @@ void *kmap_atomic(struct page *page)
__nds32__isb();
return (void *)vaddr;
}
EXPORT_SYMBOL(kmap_atomic);
EXPORT_SYMBOL(kmap_atomic_high);
void __kunmap_atomic(void *kvaddr)
{
@@ -53,5 +47,4 @@ void __kunmap_atomic(void *kvaddr)
pagefault_enable();
preempt_enable();
}
EXPORT_SYMBOL(__kunmap_atomic);