diff mbox series

[V1,08/10] arch/kmap: Don't hard code kmap_prot values

Message ID 20200430203845.582900-9-ira.weiny@intel.com (mailing list archive)
State New, archived
Headers show
Series Remove duplicated kmap code | expand

Commit Message

Ira Weiny April 30, 2020, 8:38 p.m. UTC 
From: Ira Weiny <ira.weiny@intel.com>

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.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 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(-)

Comments

Al Viro May 1, 2020, 2:16 a.m. UTC | #1 
On Thu, Apr 30, 2020 at 01:38:43PM -0700, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
> 
> 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.

Minor nitpick: it's probably worth pointing out that kmap_prot on those
is a constant...
Christoph Hellwig May 1, 2020, 8:47 a.m. UTC | #2 
On Thu, Apr 30, 2020 at 01:38:43PM -0700, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
> 
> 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.

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/arch/csky/mm/highmem.c b/arch/csky/mm/highmem.c
index 0aafbbbe651c..f4311669b5bb 100644
--- a/arch/csky/mm/highmem.c
+++ b/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;
diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c
index 155fbb107b35..87023bd1a33c 100644
--- a/arch/mips/mm/highmem.c
+++ b/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;
diff --git a/arch/nds32/mm/highmem.c b/arch/nds32/mm/highmem.c
index f6e6915c0d31..809f8c830f06 100644
--- a/arch/nds32/mm/highmem.c
+++ b/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);
 
diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c
index f57a7770eb08..8c58c4c37033 100644
--- a/arch/xtensa/mm/highmem.c
+++ b/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;
 }