The patch titled
Subject: arch/kmap: ensure kmap_prot visibility
has been added to the -mm tree. Its filename is
arch-kmap-ensure-kmap_prot-visibility.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arch-kmap-ensure-kmap_prot-visibility.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arch-kmap-ensure-kmap_prot-visibility.patch
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------------------------------------------------------
From: Ira Weiny <ira.weiny@xxxxxxxxx>
Subject: arch/kmap: ensure kmap_prot visibility
We want to support kmap_atomic_prot() on all architectures and it makes
sense to define kmap_atomic() to use the default kmap_prot.
So we ensure all arch's have a globally available kmap_prot either as a
define or exported symbol.
Link: http://lkml.kernel.org/r/20200430203845.582900-8-ira.weiny@xxxxxxxxx
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
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: Huang Rui <ray.huang@xxxxxxx>
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>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/microblaze/include/asm/highmem.h | 2 +-
arch/microblaze/mm/init.c | 3 ---
arch/powerpc/include/asm/highmem.h | 2 +-
arch/powerpc/mm/mem.c | 3 ---
arch/sparc/mm/highmem.c | 1 +
5 files changed, 3 insertions(+), 8 deletions(-)
--- a/arch/microblaze/include/asm/highmem.h~arch-kmap-ensure-kmap_prot-visibility
+++ a/arch/microblaze/include/asm/highmem.h
@@ -25,8 +25,8 @@
#include <linux/uaccess.h>
#include <asm/fixmap.h>
+#define kmap_prot PAGE_KERNEL
extern pte_t *kmap_pte;
-extern pgprot_t kmap_prot;
extern pte_t *pkmap_page_table;
/*
--- a/arch/microblaze/mm/init.c~arch-kmap-ensure-kmap_prot-visibility
+++ a/arch/microblaze/mm/init.c
@@ -49,8 +49,6 @@ unsigned long lowmem_size;
#ifdef CONFIG_HIGHMEM
pte_t *kmap_pte;
EXPORT_SYMBOL(kmap_pte);
-pgprot_t kmap_prot;
-EXPORT_SYMBOL(kmap_prot);
static inline pte_t *virt_to_kpte(unsigned long vaddr)
{
@@ -68,7 +66,6 @@ static void __init highmem_init(void)
pkmap_page_table = virt_to_kpte(PKMAP_BASE);
kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN));
- kmap_prot = PAGE_KERNEL;
}
static void highmem_setup(void)
--- a/arch/powerpc/include/asm/highmem.h~arch-kmap-ensure-kmap_prot-visibility
+++ a/arch/powerpc/include/asm/highmem.h
@@ -29,8 +29,8 @@
#include <asm/page.h>
#include <asm/fixmap.h>
+#define kmap_prot PAGE_KERNEL
extern pte_t *kmap_pte;
-extern pgprot_t kmap_prot;
extern pte_t *pkmap_page_table;
/*
--- a/arch/powerpc/mm/mem.c~arch-kmap-ensure-kmap_prot-visibility
+++ a/arch/powerpc/mm/mem.c
@@ -64,8 +64,6 @@ bool init_mem_is_free;
#ifdef CONFIG_HIGHMEM
pte_t *kmap_pte;
EXPORT_SYMBOL(kmap_pte);
-pgprot_t kmap_prot;
-EXPORT_SYMBOL(kmap_prot);
#endif
pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
@@ -245,7 +243,6 @@ void __init paging_init(void)
pkmap_page_table = virt_to_kpte(PKMAP_BASE);
kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN));
- kmap_prot = PAGE_KERNEL;
#endif /* CONFIG_HIGHMEM */
printk(KERN_DEBUG "Top of RAM: 0x%llx, Total RAM: 0x%llx\n",
--- a/arch/sparc/mm/highmem.c~arch-kmap-ensure-kmap_prot-visibility
+++ a/arch/sparc/mm/highmem.c
@@ -33,6 +33,7 @@
#include <asm/vaddrs.h>
pgprot_t kmap_prot;
+EXPORT_SYMBOL(kmap_prot);
static pte_t *kmap_pte;
_
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
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
