The patch titled
Subject: kmap: consolidate kmap_prot definitions
has been added to the -mm tree. Its filename is
kmap-consolidate-kmap_prot-definitions.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kmap-consolidate-kmap_prot-definitions.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kmap-consolidate-kmap_prot-definitions.patch
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------------------------------------------------------
From: Ira Weiny <ira.weiny@xxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200507150004.1423069-16-ira.weiny@xxxxxxxxx
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Suggested-by: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arc/include/asm/highmem.h | 3 ---
arch/arm/include/asm/highmem.h | 2 --
arch/csky/include/asm/highmem.h | 2 --
arch/microblaze/include/asm/highmem.h | 1 -
arch/mips/include/asm/highmem.h | 2 --
arch/nds32/include/asm/highmem.h | 1 -
arch/powerpc/include/asm/highmem.h | 1 -
arch/sparc/include/asm/highmem.h | 3 ++-
arch/sparc/mm/highmem.c | 4 ----
arch/x86/include/asm/fixmap.h | 1 -
include/linux/highmem.h | 4 ++++
11 files changed, 6 insertions(+), 18 deletions(-)
--- a/arch/arc/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/arc/include/asm/highmem.h
@@ -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);
--- a/arch/arm/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/arm/include/asm/highmem.h
@@ -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()) \
--- a/arch/csky/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/csky/include/asm/highmem.h
@@ -38,8 +38,6 @@ extern void *kmap_atomic_pfn(unsigned lo
extern void kmap_init(void);
-#define kmap_prot PAGE_KERNEL
-
#endif /* __KERNEL__ */
#endif /* __ASM_CSKY_HIGHMEM_H */
--- a/arch/microblaze/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/microblaze/include/asm/highmem.h
@@ -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;
--- a/arch/mips/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/mips/include/asm/highmem.h
@@ -54,8 +54,6 @@ extern void *kmap_atomic_pfn(unsigned lo
extern void kmap_init(void);
-#define kmap_prot PAGE_KERNEL
-
#endif /* __KERNEL__ */
#endif /* _ASM_HIGHMEM_H */
--- a/arch/nds32/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/nds32/include/asm/highmem.h
@@ -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)
{
--- a/arch/powerpc/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/powerpc/include/asm/highmem.h
@@ -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;
--- a/arch/sparc/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/sparc/include/asm/highmem.h
@@ -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;
--- a/arch/sparc/mm/highmem.c~kmap-consolidate-kmap_prot-definitions
+++ a/arch/sparc/mm/highmem.c
@@ -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)
--- a/arch/x86/include/asm/fixmap.h~kmap-consolidate-kmap_prot-definitions
+++ a/arch/x86/include/asm/fixmap.h
@@ -152,7 +152,6 @@ extern void reserve_top_address(unsigned
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);
--- a/include/linux/highmem.h~kmap-consolidate-kmap_prot-definitions
+++ a/include/linux/highmem.h
@@ -40,6 +40,10 @@ extern void kunmap_atomic_high(void *kva
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)
{
_
Patches currently in -mm which might be from ira.weiny@xxxxxxxxx are
arch-kmap-remove-bug_on.patch
arch-xtensa-move-kmap-build-bug-out-of-the-way.patch
arch-kmap-remove-redundant-arch-specific-kmaps.patch
arch-kunmap-remove-duplicate-kunmap-implementations.patch
x86powerpcmicroblaze-kmap-move-preempt-disable.patch
arch-kmap_atomic-consolidate-duplicate-code.patch
arch-kunmap_atomic-consolidate-duplicate-code.patch
arch-kmap-ensure-kmap_prot-visibility.patch
arch-kmap-dont-hard-code-kmap_prot-values.patch
arch-kmap-define-kmap_atomic_prot-for-all-archs.patch
drm-remove-drm-specific-kmap_atomic-code.patch
kmap-remove-kmap_atomic_to_page.patch
parisc-kmap-remove-duplicate-kmap-code.patch
sparc-remove-unnecessary-includes.patch
kmap-consolidate-kmap_prot-definitions.patch
