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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 27 May 2020 00:01:27 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>, davem@...emloft.net,
        hkallweit1@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, alexandre.belloni@...tlin.com,
        thomas.petazzoni@...tlin.com, allan.nielsen@...rochip.com
Subject: Re: [PATCH net-next 4/4] net: phy: mscc-miim: read poll when high
 resolution timers are disabled

> > +/* When high resolution timers aren't built-in: we can't use usleep_range() as
> > + * we would sleep way too long. Use udelay() instead.
> > + */
> > +#define mscc_readl_poll_timeout(addr, val, cond, delay_us, timeout_us)	\
> > +({									\
> > +	if (!IS_ENABLED(CONFIG_HIGH_RES_TIMERS))			\
> > +		readl_poll_timeout_atomic(addr, val, cond, delay_us,	\
> > +					  timeout_us);			\
> > +	readl_poll_timeout(addr, val, cond, delay_us, timeout_us);	\
> > +})
> > +
> 
> I would make this a regular function which would not harm the compiler's
> ability to optimize it, but would give you type checking. With that fixed:

Hi Florian

cond makes that difficult, since it is not a parameter in the usual
sense, but an expression to evaluate if the polling should terminate.

readl_poll_timeout() and readl_poll_timeout_atomic() themselves are
#define's, and there are more levels of macros under them.

	   Andrew

Powered by blists - more mailing lists