lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Message-Id: <20071114123513.fbff2683.wjiang@resilience.com>
Date:	Wed, 14 Nov 2007 12:35:13 +0800
From:	Jerry Jiang <wjiang@...ilience.com>
To:	linux-kernel@...r.kernel.org
Subject: [LOCK] Is it really necessary to use a "big module lock"?


Hi all,

I came across a question when review other's module code.

something like:

int __init module_init()
{
	down_interruptible(the_big_module_sem);
	// code for init...
	up(the_big_module_sem);
}

void __exit module_exit()
{
	down_interruptible(the_big_module_sem);
	// code for exit...
	up(the_big_module_sem);
}

My question is:
 - Is the lock truly necessary?
 - If adding it into code, what happens?

Thank you
-- Jerry
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ