linux-kernel - Re: Rust kernel policy

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Message-ID: <20250220103727.39114d65@gandalf.local.home>
Date: Thu, 20 Feb 2025 10:37:27 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Alexey Dobriyan <adobriyan@...il.com>
Cc: Willy Tarreau <w@....eu>, Laurent Pinchart
 <laurent.pinchart@...asonboard.com>, James Bottomley
 <James.Bottomley@...senpartnership.com>, "Martin K. Petersen"
 <martin.petersen@...cle.com>, Dan Carpenter <dan.carpenter@...aro.org>,
 Christoph Hellwig <hch@...radead.org>, Miguel Ojeda
 <miguel.ojeda.sandonis@...il.com>, rust-for-linux
 <rust-for-linux@...r.kernel.org>, Linus Torvalds
 <torvalds@...ux-foundation.org>, Greg KH <gregkh@...uxfoundation.org>,
 David Airlie <airlied@...il.com>, linux-kernel@...r.kernel.org,
 ksummit@...ts.linux.dev
Subject: Re: Rust kernel policy

On Thu, 20 Feb 2025 09:26:55 +0300
Alexey Dobriyan <adobriyan@...il.com> wrote:

> > But we should be encouraging the use of:
> > 
> > 	scoped_guard(mutex)(&my_mutex) {
> > 		/* Do the work needed for for my_mutex */
> > 	}  
> 
> Meh...
> 
> 	with_rcu() {
> 	}
> 
> 	with_mutex(g_mutex) {
> 	}
> 
> 	with_spin_lock(g_lock) {
> 	}
> 
> > Which does work out very well. And the fact that the code guarded by the
> > mutex is now also indented, it makes it easier to review.  
> 
> It only works only for ~1-2 indents then the code flow away :-(

Then perhaps you should start using helper functions ;-)

-- Steve