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authorHelge Deller <deller@gmx.de>2013-10-13 21:11:30 +0200
committerHelge Deller <deller@gmx.de>2013-11-07 22:25:33 +0100
commit61dbbaeb86c2181c79efae2d186193e0f8008af1 (patch)
treed12b369af162dcdb8835731b36da025158c8b616 /arch/parisc/include/asm/uaccess.h
parentLinux 3.12 (diff)
downloadlinux-dev-61dbbaeb86c2181c79efae2d186193e0f8008af1.tar.xz
linux-dev-61dbbaeb86c2181c79efae2d186193e0f8008af1.zip
parisc: provide macro to create exception table entries
Provide a macro ASM_EXCEPTIONTABLE_ENTRY() to create exception table entries and convert all open-coded places to use that macro. This patch is a first step toward creating a exception table which only holds 32bit pointers even on a 64bit kernel. That way in my own kernel I was able to reduce the in-kernel exception table from 44kB to 22kB. Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to '')
-rw-r--r--arch/parisc/include/asm/uaccess.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index e0a82358517e..4006964d8e12 100644
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -59,12 +59,13 @@ static inline long access_ok(int type, const void __user * addr,
/*
* The exception table contains two values: the first is an address
* for an instruction that is allowed to fault, and the second is
- * the address to the fixup routine.
+ * the address to the fixup routine. Even on a 64bit kernel we could
+ * use a 32bit (unsigned int) address here.
*/
struct exception_table_entry {
- unsigned long insn; /* address of insn that is allowed to fault. */
- long fixup; /* fixup routine */
+ unsigned long insn; /* address of insn that is allowed to fault. */
+ unsigned long fixup; /* fixup routine */
};
#define ASM_EXCEPTIONTABLE_ENTRY( fault_addr, except_addr )\