x86/alternatives: Fix build warning

Fixes these warnings:

 arch/x86/kernel/alternative.c: In function 'alternatives_text_reserved':
 arch/x86/kernel/alternative.c:402: warning: comparison of distinct pointer types lacks a cast
 arch/x86/kernel/alternative.c:402: warning: comparison of distinct pointer types lacks a cast
 arch/x86/kernel/alternative.c:405: warning: comparison of distinct pointer types lacks a cast
 arch/x86/kernel/alternative.c:405: warning: comparison of distinct pointer types lacks a cast

Caused by:

  2cfa197: ftrace/alternatives: Introducing *_text_reserved functions

Changes in v2:
  - Use local variables to compare, instead of type casts.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20100205171647.15750.37221.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 3c13284..e63b80e 100644 (file)
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -395,12 +395,14 @@ int alternatives_text_reserved(void *start, void *end)
 {
        struct smp_alt_module *mod;
        u8 **ptr;
+       u8 *text_start = start;
+       u8 *text_end = end;
 
        list_for_each_entry(mod, &smp_alt_modules, next) {
-               if (mod->text > end || mod->text_end < start)
+               if (mod->text > text_end || mod->text_end < text_start)
                        continue;
                for (ptr = mod->locks; ptr < mod->locks_end; ptr++)
-                       if (start <= *ptr && end >= *ptr)
+                       if (text_start <= *ptr && text_end >= *ptr)
                                return 1;
        }