microblaze: Fix variable types to remove W=1 warning

This patch removes this warning:
arch/microblaze/kernel/signal.c: In function 'setup_rt_frame':
arch/microblaze/kernel/signal.c:177:3: warning: signed and unsigned type
in conditional expression [-Wsign-compare]

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 8955a3829cf0..235706055b7f 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -158,7 +158,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 {
         struct rt_sigframe __user *frame;
         int err = 0, sig = ksig->sig;
-        int signal;
+        unsigned long signal;
         unsigned long address = 0;
 #ifdef CONFIG_MMU
         pmd_t *pmdp;
@@ -174,7 +174,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
                 && current_thread_info()->exec_domain->signal_invmap
                 && sig < 32
                 ? current_thread_info()->exec_domain->signal_invmap[sig]
-                : sig;
+                : (unsigned long)sig;
 
         if (ksig->ka.sa.sa_flags & SA_SIGINFO)
                 err |= copy_siginfo_to_user(&frame->info, &ksig->info);