The patch titled
Subject: arch/kmap: don't hard code kmap_prot values
has been added to the -mm tree. Its filename is
arch-kmap-dont-hard-code-kmap_prot-values.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arch-kmap-dont-hard-code-kmap_prot-values.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arch-kmap-dont-hard-code-kmap_prot-values.patch
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------------------------------------------------------
From: Ira Weiny <ira.weiny@xxxxxxxxx>
Subject: arch/kmap: don't hard code kmap_prot values
To support kmap_atomic_prot() on all architectures each arch must support
protections passed in to them.
Change csky, mips, nds32 and xtensa to use their global kmap_prot value
rather than a hard coded value which was equal.
Link: http://lkml.kernel.org/r/20200430203845.582900-9-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/csky/mm/highmem.c | 2 +-
arch/mips/mm/highmem.c | 2 +-
arch/nds32/mm/highmem.c | 2 +-
arch/xtensa/mm/highmem.c | 2 +-
4 files changed, 4 insertions(+), 4 deletions(-)
--- a/arch/csky/mm/highmem.c~arch-kmap-dont-hard-code-kmap_prot-values
+++ a/arch/csky/mm/highmem.c
@@ -32,7 +32,7 @@ void *kmap_atomic_high(struct page *page
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte - idx)));
#endif
- set_pte(kmap_pte-idx, mk_pte(page, PAGE_KERNEL));
+ set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
flush_tlb_one((unsigned long)vaddr);
return (void *)vaddr;
--- a/arch/mips/mm/highmem.c~arch-kmap-dont-hard-code-kmap_prot-values
+++ a/arch/mips/mm/highmem.c
@@ -29,7 +29,7 @@ void *kmap_atomic_high(struct page *page
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte - idx)));
#endif
- set_pte(kmap_pte-idx, mk_pte(page, PAGE_KERNEL));
+ set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
local_flush_tlb_one((unsigned long)vaddr);
return (void*) vaddr;
--- a/arch/nds32/mm/highmem.c~arch-kmap-dont-hard-code-kmap_prot-values
+++ a/arch/nds32/mm/highmem.c
@@ -21,7 +21,7 @@ void *kmap_atomic_high(struct page *page
idx = type + KM_TYPE_NR * smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
- pte = (page_to_pfn(page) << PAGE_SHIFT) | (PAGE_KERNEL);
+ pte = (page_to_pfn(page) << PAGE_SHIFT) | (kmap_prot);
ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
set_pte(ptep, pte);
--- a/arch/xtensa/mm/highmem.c~arch-kmap-dont-hard-code-kmap_prot-values
+++ a/arch/xtensa/mm/highmem.c
@@ -48,7 +48,7 @@ void *kmap_atomic_high(struct page *page
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte + idx)));
#endif
- set_pte(kmap_pte + idx, mk_pte(page, PAGE_KERNEL_EXEC));
+ set_pte(kmap_pte + idx, mk_pte(page, kmap_prot));
return (void *)vaddr;
}
_
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
