diff mbox series

[V3,15/15] kmap: Consolidate kmap_prot definitions

Message ID 20200507150004.1423069-16-ira.weiny@intel.com (mailing list archive)
State Awaiting Upstream
Headers show
Series Remove duplicated kmap code | expand

Commit Message

Ira Weiny May 7, 2020, 3 p.m. UTC 
From: Ira Weiny <ira.weiny@intel.com>

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.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

---
Changes from V2:
	New Patch for this series
---
 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(-)

Comments

Andrew Morton May 7, 2020, 8:53 p.m. UTC | #1 
On Thu,  7 May 2020 08:00:03 -0700 ira.weiny@intel.com wrote:

> From: Ira Weiny <ira.weiny@intel.com>
> 
> 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.
> 

checkpatch considered useful ;)


From: Andrew Morton <akpm@linux-foundation.org>
Subject: kmap-consolidate-kmap_prot-definitions-checkpatch-fixes

WARNING: macros should not use a trailing semicolon
#134: FILE: arch/sparc/include/asm/highmem.h:33:
+#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);

total: 0 errors, 1 warnings, 100 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/kmap-consolidate-kmap_prot-definitions.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/sparc/include/asm/highmem.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sparc/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions-checkpatch-fixes
+++ a/arch/sparc/include/asm/highmem.h
@@ -30,7 +30,7 @@
 /* declarations for highmem.c */
 extern unsigned long highstart_pfn, highend_pfn;
 
-#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
+#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE)
 extern pte_t *pkmap_page_table;
 
 void kmap_init(void) __init;
Ira Weiny May 7, 2020, 10:51 p.m. UTC | #2 
On Thu, May 07, 2020 at 01:53:07PM -0700, Andrew Morton wrote:
> On Thu,  7 May 2020 08:00:03 -0700 ira.weiny@intel.com wrote:
> 
> > From: Ira Weiny <ira.weiny@intel.com>
> > 
> > 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.
> > 
> 
> checkpatch considered useful ;)

Yes sorry...  V3.1 on it's way...

Ira

> 
> 
> From: Andrew Morton <akpm@linux-foundation.org>
> Subject: kmap-consolidate-kmap_prot-definitions-checkpatch-fixes
> 
> WARNING: macros should not use a trailing semicolon
> #134: FILE: arch/sparc/include/asm/highmem.h:33:
> +#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
> 
> total: 0 errors, 1 warnings, 100 lines checked
> 
> NOTE: For some of the reported defects, checkpatch may be able to
>       mechanically convert to the typical style using --fix or --fix-inplace.
> 
> ./patches/kmap-consolidate-kmap_prot-definitions.patch has style problems, please review.
> 
> NOTE: If any of the errors are false positives, please report
>       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> 
> Please run checkpatch prior to sending patches
> 
> Cc: Ira Weiny <ira.weiny@intel.com>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
> 
>  arch/sparc/include/asm/highmem.h |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/arch/sparc/include/asm/highmem.h~kmap-consolidate-kmap_prot-definitions-checkpatch-fixes
> +++ a/arch/sparc/include/asm/highmem.h
> @@ -30,7 +30,7 @@
>  /* declarations for highmem.c */
>  extern unsigned long highstart_pfn, highend_pfn;
>  
> -#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
> +#define kmap_prot __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE)
>  extern pte_t *pkmap_page_table;
>  
>  void kmap_init(void) __init;
> _
>
diff mbox series

Patch

diff --git a/arch/arc/include/asm/highmem.h b/arch/arc/include/asm/highmem.h
index 70900a73bfc8..6e5eafb3afdd 100644
--- a/arch/arc/include/asm/highmem.h
+++ b/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);
diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h
index b0d4bd8dc3c1..31811be38d78 100644
--- a/arch/arm/include/asm/highmem.h
+++ b/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()) \
diff --git a/arch/csky/include/asm/highmem.h b/arch/csky/include/asm/highmem.h
index ea2f3f39174d..14645e3d5cd5 100644
--- a/arch/csky/include/asm/highmem.h
+++ b/arch/csky/include/asm/highmem.h
@@ -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 */
diff --git a/arch/microblaze/include/asm/highmem.h b/arch/microblaze/include/asm/highmem.h
index d7c55cfd27bd..284ca8fb54c1 100644
--- a/arch/microblaze/include/asm/highmem.h
+++ b/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;
 
diff --git a/arch/mips/include/asm/highmem.h b/arch/mips/include/asm/highmem.h
index 76dec0bd4f59..f1f788b57166 100644
--- a/arch/mips/include/asm/highmem.h
+++ b/arch/mips/include/asm/highmem.h
@@ -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 */
diff --git a/arch/nds32/include/asm/highmem.h b/arch/nds32/include/asm/highmem.h
index a48a6536d41a..5717647d14d1 100644
--- a/arch/nds32/include/asm/highmem.h
+++ b/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)
 {
diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h
index 8d8ee3fcd800..104026f7d6bc 100644
--- a/arch/powerpc/include/asm/highmem.h
+++ b/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;
 
diff --git a/arch/sparc/include/asm/highmem.h b/arch/sparc/include/asm/highmem.h
index f4babe67cb5d..37f8694bde84 100644
--- a/arch/sparc/include/asm/highmem.h
+++ b/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;
diff --git a/arch/sparc/mm/highmem.c b/arch/sparc/mm/highmem.c
index 414f578d1e57..d237d902f9c3 100644
--- a/arch/sparc/mm/highmem.c
+++ b/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)
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index 28183ee3cc42..b9527a54db99 100644
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -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);
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index cc0c3904e501..bf470c16cecb 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -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)
 {