staging: speakup: Remove the explicit NULL comparison

Fixed coding style for null comparisons in speakup driver to be more
consistant with the rest of the kernel coding style.
Replaced 'x != NULL' with 'x' and 'x = NULL' with '!x'.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/speakup/fakekey.c

@@ -56,7 +56,7 @@ int speakup_add_virtual_keyboard(void)
 
 void speakup_remove_virtual_keyboard(void)
 {
-	if (virt_keyboard != NULL) {
+	if (virt_keyboard) {
 		input_unregister_device(virt_keyboard);
 		virt_keyboard = NULL;
 	}

drivers/staging/speakup/main.c

@@ -301,7 +301,7 @@ static void speakup_shut_up(struct vc_data *vc)
 	spk_shut_up |= 0x01;
 	spk_parked &= 0xfe;
 	speakup_date(vc);
-	if (synth != NULL)
+	if (synth)
 		spk_do_flush();
 }
 
@@ -446,7 +446,7 @@ static void speak_char(u16 ch)
 	}
 
 	cp = spk_characters[ch];
-	if (cp == NULL) {
+	if (!cp) {
 		pr_info("speak_char: cp == NULL!\n");
 		return;
 	}
@@ -1171,7 +1171,7 @@ static void do_handle_shift(struct vc_data *vc, u_char value, char up_flag)
 {
 	unsigned long flags;
 
-	if (synth == NULL || up_flag || spk_killed)
+	if (!synth || up_flag || spk_killed)
 		return;
 	spin_lock_irqsave(&speakup_info.spinlock, flags);
 	if (cursor_track == read_all_mode) {
@@ -1209,7 +1209,7 @@ static void do_handle_latin(struct vc_data *vc, u_char value, char up_flag)
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		return;
 	}
-	if (synth == NULL || spk_killed) {
+	if (!synth || spk_killed) {
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		return;
 	}
@@ -1346,7 +1346,7 @@ static int speakup_allocate(struct vc_data *vc, gfp_t gfp_flags)
 	int vc_num;
 
 	vc_num = vc->vc_num;
-	if (speakup_console[vc_num] == NULL) {
+	if (!speakup_console[vc_num]) {
 		speakup_console[vc_num] = kzalloc(sizeof(*speakup_console[0]),
 						  gfp_flags);
 		if (!speakup_console[vc_num])
@@ -1399,7 +1399,7 @@ static void kbd_fakekey2(struct vc_data *vc, int command)
 
 static void read_all_doc(struct vc_data *vc)
 {
-	if ((vc->vc_num != fg_console) || synth == NULL || spk_shut_up)
+	if ((vc->vc_num != fg_console) || !synth || spk_shut_up)
 		return;
 	if (!synth_supports_indexing())
 		return;
@@ -1514,7 +1514,7 @@ static int pre_handle_cursor(struct vc_data *vc, u_char value, char up_flag)
 	spin_lock_irqsave(&speakup_info.spinlock, flags);
 	if (cursor_track == read_all_mode) {
 		spk_parked &= 0xfe;
-		if (synth == NULL || up_flag || spk_shut_up) {
+		if (!synth || up_flag || spk_shut_up) {
 			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 			return NOTIFY_STOP;
 		}
@@ -1536,7 +1536,7 @@ static void do_handle_cursor(struct vc_data *vc, u_char value, char up_flag)
 
 	spin_lock_irqsave(&speakup_info.spinlock, flags);
 	spk_parked &= 0xfe;
-	if (synth == NULL || up_flag || spk_shut_up || cursor_track == CT_Off) {
+	if (!synth || up_flag || spk_shut_up || cursor_track == CT_Off) {
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		return;
 	}
@@ -1732,7 +1732,7 @@ static void speakup_bs(struct vc_data *vc)
 		return;
 	if (!spk_parked)
 		speakup_date(vc);
-	if (spk_shut_up || synth == NULL) {
+	if (spk_shut_up || !synth) {
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		return;
 	}
@@ -1749,7 +1749,7 @@ static void speakup_con_write(struct vc_data *vc, u16 *str, int len)
 {
 	unsigned long flags;
 
-	if ((vc->vc_num != fg_console) || spk_shut_up || synth == NULL)
+	if ((vc->vc_num != fg_console) || spk_shut_up || !synth)
 		return;
 	if (!spin_trylock_irqsave(&speakup_info.spinlock, flags))
 		/* Speakup output, discard */
@@ -1778,7 +1778,7 @@ static void speakup_con_update(struct vc_data *vc)
 {
 	unsigned long flags;
 
-	if (speakup_console[vc->vc_num] == NULL || spk_parked)
+	if (!speakup_console[vc->vc_num] || spk_parked)
 		return;
 	if (!spin_trylock_irqsave(&speakup_info.spinlock, flags))
 		/* Speakup output, discard */
@@ -1793,7 +1793,7 @@ static void do_handle_spec(struct vc_data *vc, u_char value, char up_flag)
 	int on_off = 2;
 	char *label;
 
-	if (synth == NULL || up_flag || spk_killed)
+	if (!synth || up_flag || spk_killed)
 		return;
 	spin_lock_irqsave(&speakup_info.spinlock, flags);
 	spk_shut_up &= 0xfe;
@@ -1837,7 +1837,7 @@ static int inc_dec_var(u_char value)
 
 	var_id = var_id / 2 + FIRST_SET_VAR;
 	p_header = spk_get_var_header(var_id);
-	if (p_header == NULL)
+	if (!p_header)
 		return -1;
 	if (p_header->var_type != VAR_NUM)
 		return -1;
@@ -1920,7 +1920,7 @@ static void speakup_bits(struct vc_data *vc)
 {
 	int val = this_speakup_key - (FIRST_EDIT_BITS - 1);
 
-	if (spk_special_handler != NULL || val < 1 || val > 6) {
+	if (spk_special_handler || val < 1 || val > 6) {
 		synth_printf("%s\n", spk_msg_get(MSG_ERROR));
 		return;
 	}
@@ -2014,7 +2014,7 @@ static int handle_goto(struct vc_data *vc, u_char type, u_char ch, u_short key)
 
 static void speakup_goto(struct vc_data *vc)
 {
-	if (spk_special_handler != NULL) {
+	if (spk_special_handler) {
 		synth_printf("%s\n", spk_msg_get(MSG_ERROR));
 		return;
 	}
@@ -2165,7 +2165,7 @@ speakup_key(struct vc_data *vc, int shift_state, int keycode, u_short keysym,
 		}
 	}
 no_map:
-	if (type == KT_SPKUP && spk_special_handler == NULL) {
+	if (type == KT_SPKUP && !spk_special_handler) {
 		do_spkup(vc, new_key);
 		spk_close_press = 0;
 		ret = 1;