Date: Wed, 2 Aug 2017 14:38:50 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Konstantin Belousov <kib@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r321920 - head/sys/sys Message-ID: <37abc595-c80e-a8da-04a8-815f42c634de@selasky.org> In-Reply-To: <f7a4a90c-f1d8-b381-27fe-3cf76b574a29@selasky.org> References: <201708021014.v72AEHEk061037@repo.freebsd.org> <f7a4a90c-f1d8-b381-27fe-3cf76b574a29@selasky.org>
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On 08/02/17 14:36, Hans Petter Selasky wrote: > On 08/02/17 12:14, Konstantin Belousov wrote: >> +#define major(x) ((int)((dev_t)(x) >> 32)) /* major number */ >> +#define minor(x) ((int)((x) & 0xffffffff)) /* minor number */ >> +#define makedev(x, y) (((dev_t)(x) << 32) | (y)) /* create >> dev_t */ > > One more comment on this issue: > > I think makedev(x, y) should be declared like this, to avoid issues when > "y" is negative: > > #define makedev(x, y) (((dev_t)(x) << 32) | (unsigned int)(y)) > /* create dev_t */ > > ??? > > --HPS > > And you'll probably want a final wrapping dev_t cast aswell. 128-bit numbers are not yet there. #define makedev(x, y) ((dev_t)(((dev_t)(x) << 32) | (unsigned int)(y))) > /* create dev_t */ --HPS
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