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Message-ID: <5415DCE6.301@gmail.com> Date: Sun, 14 Sep 2014 20:22:30 +0200 From: Stephan Müller <fruktopus@...il.com> To: unlisted-recipients:; (no To-header on input) CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-api@...r.kernel.org Subject: Re: [PATCH] Change userspace MKDEV, MAJOR, MINOR-macros from 8+8 bit, to 12+20 bit layout Am 14.09.2014 19:46, schrieb Greg KH: > On Sun, Sep 14, 2014 at 07:35:28PM +0200, Stephan Müller wrote: >> Delete old userspace-only versions (8+8 bit). Instead expose the kernel-space >> definitions (12+20 bit). >> >> Signed-off-by: Stephan Mueller <fruktopus@...il.com> >> --- >> >> Browsing some code I found that user-space and kernel-space macros for (un-)packing major/minor device numbers differ. The user-space ones using still the old 16 bit scheme. There was no explaining comment around and most libraries have their own macros anyway so it should not be a problematic UAPI change. So IMHO we could win some coherence in abandon this discrepancy. >> Please correct me if I am wrong. > > You are wrong, we can't change this api, things will break :( > > sorry, > > greg k-h I kind of expected this. The #ifndef __KERNEL__ was suspicious.. thanks -- 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/
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