linux-kernel - Question about context imbalance warning in sparse

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Date: Mon, 8 Apr 2024 21:33:18 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Question about context imbalance warning in sparse

Hi Luc,


Sparse does not seem to consider the first parameter
of __context__().

Sparse does not warn anything about this code.


void foo(void)
{
        __context__(a, 1);
        __context__(b, -1);
}




In Linux, I think sparse should warn
the following code
(lock and unlock different locks)


void foo(void)
{
        write_lock(&my_lock1);
        write_unlock(&my_lock2);
}



-- 
Best Regards
Masahiro Yamada