lkml.org 
[lkml]   [2020]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH 3.16 25/63] arm64: fix COMPAT_SHMLBA definition for large pages
3.16.81-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Yury Norov <ynorov@caviumnetworks.com>

commit b9b7aebb42d1b1392f3111de61136bb6cf3aae3f upstream.

ARM glibc uses (4 * __getpagesize()) for SHMLBA, which is correct for
4KB pages and works fine for 64KB pages, but the kernel uses a hardcoded
16KB that is too small for 64KB page based kernels. This changes the
definition to what user space sees when using 64KB pages.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
arch/arm64/include/asm/shmparam.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/include/asm/shmparam.h
+++ b/arch/arm64/include/asm/shmparam.h
@@ -21,7 +21,7 @@
* alignment value. Since we don't have aliasing D-caches, the rest of
* the time we can safely use PAGE_SIZE.
*/
-#define COMPAT_SHMLBA 0x4000
+#define COMPAT_SHMLBA (4 * PAGE_SIZE)

#include <asm-generic/shmparam.h>

\
 
 \ /
  Last update: 2020-01-08 20:47    [W:0.194 / U:49.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site