[PATCH] uml: x86_64 fixes
This fixes some x86_64 bugs -
- maybe_map returns -1 on error instead of 0, which is interpreted as
physical address 0
- removed an include of ipc.h, which isn't needed
- fixed the calculation of signal frame location
- the signal delivery code is now immune to the stack expansion check
- added a missing include
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index f7da9d0..7519528 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -29,9 +29,12 @@
if(IS_ERR(phys) || (is_write && !pte_write(pte))){
err = handle_page_fault(virt, 0, is_write, 1, &dummy_code);
if(err)
- return(0);
+ return(-1UL);
phys = um_virt_to_phys(current, virt, NULL);
}
+ if(IS_ERR(phys))
+ phys = (void *) -1;
+
return((unsigned long) phys);
}
@@ -42,7 +45,7 @@
int n;
addr = maybe_map(addr, is_write);
- if(addr == -1)
+ if(addr == -1UL)
return(-1);
page = phys_to_page(addr);