generalize lgread_u32/lgwrite_u32.
Jes complains that page table code still uses lgread_u32 even though
it now uses general kernel pte types. The best thing to do is to
generalize lgread_u32 and lgwrite_u32.
This means we lose the efficiency of getuser(). We could potentially
regain it if we used __copy_from_user instead of copy_from_user, but
I'm not certain that our range check is equivalent to access_ok() on
all platforms.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Jes Sorensen <jes@sgi.com>
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index ef976cc..9eed12d 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -222,7 +222,7 @@
return 0;
/* Decoding x86 instructions is icky. */
- lgread(lg, &insn, physaddr, 1);
+ insn = lgread(lg, physaddr, u8);
/* 0x66 is an "operand prefix". It means it's using the upper 16 bits
of the eax register. */
@@ -230,7 +230,7 @@
shift = 16;
/* The instruction is 1 byte so far, read the next byte. */
insnlen = 1;
- lgread(lg, &insn, physaddr + insnlen, 1);
+ insn = lgread(lg, physaddr + insnlen, u8);
}
/* We can ignore the lower bit for the moment and decode the 4 opcodes