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kmap: consolidate kmap_prot definitions 

Most architectures define kmap_prot to be PAGE_KERNEL.

Let sparc and xtensa define there own and define PAGE_KERNEL as the
default if not overridden.

[akpm@linux-foundation.org: coding style fixes]
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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/20200507150004.1423069-16-ira.weiny@intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ira Weiny 2020-06-04 16:48:18 -07:00 committed by Linus Torvalds
parent db6f1785f1
commit 090e77e166
11 changed files with 6 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arc/include/asm/highmem.h
View File

@ -25,9 +25,6 @@
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
#define kmap_prot PAGE_KERNEL
#include <asm/cacheflush.h>
extern void kmap_init(void);

2
arch/arm/include/asm/highmem.h
View File

@ -10,8 +10,6 @@
#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
#define kmap_prot PAGE_KERNEL
#define flush_cache_kmaps() \
do { \
if (cache_is_vivt()) \

2
arch/csky/include/asm/highmem.h
View File

@ -38,8 +38,6 @@ extern void *kmap_atomic_pfn(unsigned long pfn);
extern void kmap_init(void);
#define kmap_prot PAGE_KERNEL
#endif /* __KERNEL__ */
#endif /* __ASM_CSKY_HIGHMEM_H */

1
arch/microblaze/include/asm/highmem.h
View File

@ -25,7 +25,6 @@
#include <linux/uaccess.h>
#include <asm/fixmap.h>
#define kmap_prot PAGE_KERNEL
extern pte_t *kmap_pte;
extern pte_t *pkmap_page_table;

2
arch/mips/include/asm/highmem.h
View File

@ -54,8 +54,6 @@ extern void *kmap_atomic_pfn(unsigned long pfn);
extern void kmap_init(void);
#define kmap_prot PAGE_KERNEL
#endif /* __KERNEL__ */
#endif /* _ASM_HIGHMEM_H */

1
arch/nds32/include/asm/highmem.h
View File

@ -32,7 +32,6 @@
#define LAST_PKMAP_MASK (LAST_PKMAP - 1)
#define PKMAP_NR(virt) (((virt) - (PKMAP_BASE)) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
#define kmap_prot PAGE_KERNEL
static inline void flush_cache_kmaps(void)
{

1
arch/powerpc/include/asm/highmem.h
View File

@ -29,7 +29,6 @@
#include <asm/page.h>
#include <asm/fixmap.h>
#define kmap_prot PAGE_KERNEL
extern pte_t *kmap_pte;
extern pte_t *pkmap_page_table;

3
arch/sparc/include/asm/highmem.h
View File

@ -25,11 +25,12 @@
#include <asm/vaddrs.h>
#include <asm/kmap_types.h>
#include <asm/pgtable.h>
#include <asm/pgtsrmmu.h>
/* declarations for highmem.c */
extern unsigned long highstart_pfn, highend_pfn;
extern pgprot_t kmap_prot;
#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE)
extern pte_t *pkmap_page_table;
void kmap_init(void) __init;

4
arch/sparc/mm/highmem.c
View File

@ -32,9 +32,6 @@
#include <asm/pgalloc.h>
#include <asm/vaddrs.h>
pgprot_t kmap_prot;
EXPORT_SYMBOL(kmap_prot);
static pte_t *kmap_pte;
void __init kmap_init(void)
@ -51,7 +48,6 @@ void __init kmap_init(void)
/* cache the first kmap pte */
kmap_pte = pte_offset_kernel(dir, address);
kmap_prot = __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
}
void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)

1
arch/x86/include/asm/fixmap.h
View File

@ -152,7 +152,6 @@ extern void reserve_top_address(unsigned long reserve);
extern int fixmaps_set;
extern pte_t *kmap_pte;
#define kmap_prot PAGE_KERNEL
extern pte_t *pkmap_page_table;
void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);

4
include/linux/highmem.h
View File

@ -40,6 +40,10 @@ extern void kunmap_atomic_high(void *kvaddr);
static inline void kmap_flush_tlb(unsigned long addr) { }
#endif
#ifndef kmap_prot
#define kmap_prot PAGE_KERNEL
#endif
void *kmap_high(struct page *page);
static inline void *kmap(struct page *page)
{