lkml.org 
[lkml]   [2018]   [Dec]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 01/14] csky: fixup abiv2 mmap(... O_SYNC) failed.
Date
From: Guo Ren <ren_guo@c-sky.com>

Glibc function mmap(... O_SYNC) will make page to _PAGE_UNCACHE +
_PAGE_SO and strong-order page couldn't support unalignment access.
So remove _PAGE_SO from _PAGE_UNCACHE, also sync abiv1 with the macro
of _PAGE_SO.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Liu Renwei <Renwei.Liu@verisilicon.com>
Tested-by: Yuan Qiyun <qiyun_yuan@c-sky.com>
---
arch/csky/abiv1/inc/abi/pgtable-bits.h | 1 +
arch/csky/abiv2/inc/abi/pgtable-bits.h | 2 +-
arch/csky/mm/ioremap.c | 2 +-
3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/csky/abiv1/inc/abi/pgtable-bits.h b/arch/csky/abiv1/inc/abi/pgtable-bits.h
index 455075b..d605445 100644
--- a/arch/csky/abiv1/inc/abi/pgtable-bits.h
+++ b/arch/csky/abiv1/inc/abi/pgtable-bits.h
@@ -26,6 +26,7 @@

#define _PAGE_CACHE (3<<9)
#define _PAGE_UNCACHE (2<<9)
+#define _PAGE_SO _PAGE_UNCACHE

#define _CACHE_MASK (7<<9)

diff --git a/arch/csky/abiv2/inc/abi/pgtable-bits.h b/arch/csky/abiv2/inc/abi/pgtable-bits.h
index b20ae19..137f793 100644
--- a/arch/csky/abiv2/inc/abi/pgtable-bits.h
+++ b/arch/csky/abiv2/inc/abi/pgtable-bits.h
@@ -32,6 +32,6 @@
#define _CACHE_MASK _PAGE_CACHE

#define _CACHE_CACHED (_PAGE_VALID | _PAGE_CACHE | _PAGE_BUF)
-#define _CACHE_UNCACHED (_PAGE_VALID | _PAGE_SO)
+#define _CACHE_UNCACHED (_PAGE_VALID)

#endif /* __ASM_CSKY_PGTABLE_BITS_H */
diff --git a/arch/csky/mm/ioremap.c b/arch/csky/mm/ioremap.c
index 7ad3ff1..cb7c03e 100644
--- a/arch/csky/mm/ioremap.c
+++ b/arch/csky/mm/ioremap.c
@@ -30,7 +30,7 @@ void __iomem *ioremap(phys_addr_t addr, size_t size)
vaddr = (unsigned long)area->addr;

prot = __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE |
- _PAGE_GLOBAL | _CACHE_UNCACHED);
+ _PAGE_GLOBAL | _CACHE_UNCACHED | _PAGE_SO);

if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
free_vm_area(area);
--
2.7.4
\
 
 \ /
  Last update: 2018-12-31 16:34    [W:0.064 / U:0.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site