Re: [PATCH v2 1/2] Change DEFINE_SEMAPHORE() to take a number argument

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To: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH v2 1/2] Change DEFINE_SEMAPHORE() to take a number argument
From: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Date: Tue, 11 Apr 2023 21:05:12 -0700
Cc: david@xxxxxxxxxx, patches@xxxxxxxxxxxxxxx, linux-modules@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, pmladek@xxxxxxxx, petr.pavlu@xxxxxxxx, prarit@xxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx, rafael@xxxxxxxxxx, christophe.leroy@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, song@xxxxxxxxxx, rppt@xxxxxxxxxx, dave@xxxxxxxxxxxx, vbabka@xxxxxxx, mhocko@xxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, colin.i.king@xxxxxxxxx, jim.cromie@xxxxxxxxx, catalin.marinas@xxxxxxx, jbaron@xxxxxxxxxx, rick.p.edgecombe@xxxxxxxxx
In-reply-to: <ZDB+zn3X4sac9DFU@casper.infradead.org>
References: <20230405203505.1343562-1-mcgrof@kernel.org> <20230405203505.1343562-2-mcgrof@kernel.org> <ZDB+zn3X4sac9DFU@casper.infradead.org>

On Fri, Apr 07, 2023 at 09:36:30PM +0100, Matthew Wilcox wrote:
> Or this:
> 
> /*
>  * Unlike mutexes, binary semaphores do not have an owner, so up() can
>  * be called in a different thread from the one which called down().
>  * It is also safe to call down_trylock() and up() from interrupt
>  * context.
>  */

I went with that. Thanks for helping me paint this shed!

  Luis

References:
- [PATCH v2 0/2] kmod: simplify with a semaphore
  - From: Luis Chamberlain
- [PATCH v2 1/2] Change DEFINE_SEMAPHORE() to take a number argument
  - From: Luis Chamberlain
- Re: [PATCH v2 1/2] Change DEFINE_SEMAPHORE() to take a number argument
  - From: Matthew Wilcox

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