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authorDavid S. Miller <davem@davemloft.net>2012-05-23 19:56:06 -0700
committerDavid S. Miller <davem@davemloft.net>2012-05-24 13:04:24 -0700
commit35c9646062eba15351c6d64ea0c02176e5cb66ac (patch)
tree46b29964dfbf21e6757b5ab629c6f748897d34e5 /arch/sparc/include
parent4efcac3a244de86593a82ca4ed945e839eb4c5af (diff)
downloadlinux-35c9646062eba15351c6d64ea0c02176e5cb66ac.tar.bz2
sparc: Increase portability of strncpy_from_user() implementation.
Hide details of maximum user address calculation in a new asm/uaccess.h interface named user_addr_max(). Provide little-endian implementation in find_zero(), which should work but can probably be improved. Abstrace alignment check behind IS_UNALIGNED() macro. Kill double-semicolon, noticed by David Howells. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include')
-rw-r--r--arch/sparc/include/asm/uaccess.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/uaccess.h b/arch/sparc/include/asm/uaccess.h
index 42a28cfd941f..20c2acb06332 100644
--- a/arch/sparc/include/asm/uaccess.h
+++ b/arch/sparc/include/asm/uaccess.h
@@ -6,6 +6,9 @@
#include <asm/uaccess_32.h>
#endif
+#define user_addr_max() \
+ (segment_eq(get_fs(), USER_DS) ? STACK_TOP : ~0UL)
+
extern long strncpy_from_user(char *dest, const char __user *src, long count);
#endif