uml: const and other tidying

This patch also does some improvements for uml code.  Improvements include
dropping unnecessary cast, killing some unnecessary code and still some
constifying for pointers etc..

Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 4 deletions

diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index e3e72418f241..96072e27a0e7 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -65,7 +65,7 @@ static void setup_highmem(unsigned long highmem_start,
 void __init mem_init(void)
 {
         /* clear the zero-page */
-        memset((void *) empty_zero_page, 0, PAGE_SIZE);
+        memset(empty_zero_page, 0, PAGE_SIZE);
 
         /* Map in the area just after the brk now that kmalloc is about
          * to be turned on.
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index c7ea7f2a8945..91bd68eaba20 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -60,8 +60,6 @@ unsigned long alloc_stack(int order, int atomic)
         if (atomic)
                 flags = GFP_ATOMIC;
         page = __get_free_pages(flags, order);
-        if (page == 0)
-                return 0;
 
         return page;
 }
@@ -331,7 +329,7 @@ void do_uml_exitcalls(void)
                 (*call)();
 }
 
-char *uml_strdup(char *string)
+char *uml_strdup(const char *string)
 {
         return kstrdup(string, GFP_KERNEL);
 }