Re: [PATCH 6/9] drivers/net/wireless/iwlwifi/iwl-4965.c: Correctuse of ! and &

From: Ingo Molnar
Date: Wed Mar 05 2008 - 02:02:54 EST



* Christopher Li <sparse@xxxxxxxxxxx> wrote:

> I think Al Viro has sent a patch to linux-sparse with subject "[PATCH
> 3/3] catch !x & y brainos" does exactly that.

ah - nice :-)

/me checks the linux-sparse archive

Al's patch is:

+ if (op == '&' && expr->left->type == EXPR_PREOP &&
+ expr->left->op == '!')
+ warning(expr->pos, "dubious: !x & y");

i think there might be similar patterns: "x & !y", "!x | y", "x | !y" ?

Ingo
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