[PATCH trivial] Fix "value computed not used" warnings

[Takashi Iwai <tiwai@suse.de>]

Fixes for annoying gcc-4.1 compile warnings "value computed not used".
Simply cast to void.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/block/paride/comm.c |   16 ++++++++--------
 drivers/block/paride/on26.c |    2 +-
 drivers/net/8139too.c       |    2 +-
 kernel/kexec.c              |    4 ++--
 4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/block/paride/comm.c b/drivers/block/paride/comm.c
index d842956..065820b 100644
--- a/drivers/block/paride/comm.c
+++ b/drivers/block/paride/comm.c
@@ -60,7 +60,7 @@ static int comm_read_regr( PIA *pi, int 
 
 	case 2:
 	case 3:
-        case 4: w3(r+0x20); r1(); 
+        case 4: w3(r+0x20); (void) r1(); 
         	w2(0x24); h = r4(); w2(4);
                 return h;
 
@@ -82,7 +82,7 @@ static void comm_write_regr( PIA *pi, in
 
 	case 2:
 	case 3:
-        case 4: w3(r); r1(); w4(val); 
+        case 4: w3(r); (void) r1(); w4(val); 
                 break;
         }
 }
@@ -126,17 +126,17 @@ static void comm_read_block( PIA *pi, ch
 		w2(4);
 		break;
 		
-	case 2: w3(0x68); r1(); w2(0x24);
+	case 2: w3(0x68); (void) r1(); w2(0x24);
 		for (i=0;i<count;i++) buf[i] = r4();
 		w2(4);
 		break;
 
-        case 3: w3(0x68); r1(); w2(0x24);
+        case 3: w3(0x68); (void) r1(); w2(0x24);
                 for (i=0;i<count/2;i++) ((u16 *)buf)[i] = r4w();
                 w2(4);
                 break;
 
-        case 4: w3(0x68); r1(); w2(0x24);
+        case 4: w3(0x68); (void) r1(); w2(0x24);
                 for (i=0;i<count/4;i++) ((u32 *)buf)[i] = r4l();
                 w2(4);
                 break;
@@ -160,15 +160,15 @@ static void comm_write_block( PIA *pi, c
                 w2(5); w2(4);
                 break;
 
-        case 2: w3(0x48); r1();
+        case 2: w3(0x48); (void) r1();
                 for (k=0;k<count;k++) w4(buf[k^1]);
                 break;
 
-        case 3: w3(0x48); r1();
+        case 3: w3(0x48); (void) r1();
                 for (k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
                 break;
 
-        case 4: w3(0x48); r1();
+        case 4: w3(0x48); (void) r1();
                 for (k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
                 break;
 
diff --git a/drivers/block/paride/on26.c b/drivers/block/paride/on26.c
index 9f837d9..8090014 100644
--- a/drivers/block/paride/on26.c
+++ b/drivers/block/paride/on26.c
@@ -66,7 +66,7 @@ static int on26_read_regr( PIA *pi, int 
 	case 3:
         case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
 		w3(0); w3(0); w2(0x24); a = r4(); w2(4);
-		w2(0x24); r4(); w2(4);
+		w2(0x24); (void) r4(); w2(4);
                 return a;
 
         }
diff --git a/drivers/net/8139too.c b/drivers/net/8139too.c
index 2beac55..3611b66 100644
--- a/drivers/net/8139too.c
+++ b/drivers/net/8139too.c
@@ -1131,7 +1131,7 @@ static void __devexit rtl8139_remove_one
    No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
  */
 
-#define eeprom_delay()	RTL_R32(Cfg9346)
+#define eeprom_delay()	(void) RTL_R32(Cfg9346)
 
 /* The EEPROM commands include the alway-set leading bit. */
 #define EE_WRITE_CMD	(5)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index bf39d28..9351be7 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -995,7 +995,7 @@ asmlinkage long sys_kexec_load(unsigned 
 	image = xchg(dest_image, image);
 
 out:
-	xchg(&kexec_lock, 0); /* Release the mutex */
+	(void) xchg(&kexec_lock, 0); /* Release the mutex */
 	kimage_free(image);
 
 	return result;
@@ -1063,7 +1063,7 @@ void crash_kexec(struct pt_regs *regs)
 			machine_crash_shutdown(&fixed_regs);
 			machine_kexec(image);
 		}
-		xchg(&kexec_lock, 0);
+		(void) xchg(&kexec_lock, 0);
 	}
 }
 
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