idio{,ma}tic typos (was Re: + fix-vm_can_nonlinear-check-in-sys_remap_file_pages.patch added to -mm tree)

[Alexey Dobriyan <adobriyan@sw.ru>]

["if (!x & y)" patch from yanzheng@]
["if (!x & y)" patch from adobriyan@]
["if (!x & y)" patches from viro@]

While we're at it, below is somewhat ugly sparse patch for detecting
"&& 0x" typos.

diff --git a/evaluate.c b/evaluate.c
index c0e9d17..186756b 100644
--- a/evaluate.c
+++ b/evaluate.c
@@ -877,6 +877,13 @@ static struct symbol *evaluate_logical(struct expression *expr)
 	if (!evaluate_conditional(expr->right, 0))
 		return NULL;
 
+	if (expr->op == SPECIAL_LOGICAL_AND) {
+		if (expr->left->type == EXPR_VALUE && expr->left->orig_in_hex)
+			warning(expr->pos, "dubious && 0x");
+		if (expr->right->type == EXPR_VALUE && expr->right->orig_in_hex)
+			warning(expr->pos, "dubious && 0x");
+	}
+
 	expr->ctype = &bool_ctype;
 	if (expr->flags) {
 		if (!(expr->left->flags & expr->right->flags & Int_const_expr))
diff --git a/expression.c b/expression.c
index 289927a..9bcf586 100644
--- a/expression.c
+++ b/expression.c
@@ -361,6 +361,7 @@ got_it:
 	expr->flags = Int_const_expr;
         expr->ctype = ctype_integer(modifiers);
         expr->value = value;
+	expr->orig_in_hex = (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'));
 	return;
 Eoverflow:
 	error_die(expr->pos, "constant %s is too big even for unsigned long long",
@@ -70,6 +70,7 @@ struct expression {
 		struct {
 			unsigned long long value;
 			unsigned taint;
+			unsigned int orig_in_hex:1;
 		};
 
 		// EXPR_FVALUE


Here are wonders that it found:

drivers/media/video/se401.c:1283:13: warning: dubious && 0x

	if (!cp[2] && SE401_FORMAT_BAYER) {
		err("Bayer format not supported!");
		return 1;
	}

	known issue, I sent a patch about it.


drivers/mmc/host/tifm_sd.c:183:9: warning: dubious && 0x

	if ((r_data->flags & MMC_DATA_WRITE)
            && DATA_CARRY)
		writel(host->bounce_buf_data[0],
		host->dev->addr
		+ SOCK_MMCSD_DATA);

	given that DATA_CARRY is always used together with ->cmd_flags,
	this place is asking for obvious fixlet:


[PATCH] tifm_sd.c: fix DATA_CARRY check

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
---

 drivers/mmc/host/tifm_sd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -180,7 +180,7 @@ static void tifm_sd_transfer_data(struct tifm_sd *host)
 			host->sg_pos++;
 			if (host->sg_pos == host->sg_len) {
 				if ((r_data->flags & MMC_DATA_WRITE)
-				    && DATA_CARRY)
+				    && (host->cmd_flags & DATA_CARRY))
 					writel(host->bounce_buf_data[0],
 					       host->dev->addr
 					       + SOCK_MMCSD_DATA);



drivers/net/wireless/arlan-main.c:439:3: warning: dubious && 0x
drivers/net/wireless/arlan-main.c:439:3: warning: dubious && 0x
drivers/net/wireless/arlan-main.c:439:3: warning: dubious && 0x
drivers/net/wireless/arlan-main.c:439:3: warning: dubious && 0x

	#define setPowerOff(dev){\ 
	   writeControlRegister(dev,readControlRegister(dev) |
	   (ARLAN_POWER && ARLAN_ACCESS));
	   		^^^


[PATCH] arlan: fix "x && y" typo

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
---

 drivers/net/wireless/arlan.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/arlan.h
+++ b/drivers/net/wireless/arlan.h
@@ -485,7 +485,7 @@ struct arlan_private {
 #define clearClearInterrupt(dev){\
    writeControlRegister(dev,readControlRegister(dev) & ~ARLAN_CLEAR_INTERRUPT);}
 #define setPowerOff(dev){\
-   writeControlRegister(dev,readControlRegister(dev) | (ARLAN_POWER && ARLAN_ACCESS));\
+   writeControlRegister(dev,readControlRegister(dev) | (ARLAN_POWER & ARLAN_ACCESS));\
    writeControlRegister(dev,readControlRegister(dev) & ~ARLAN_ACCESS);}
 #define setPowerOn(dev){\
    writeControlRegister(dev,readControlRegister(dev) & ~(ARLAN_POWER));   }