From: Pavel Machek <pavel@ucw.cz>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Pavel Machek <pavel@ucw.cz>, Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>,
David Brownell <david-b@pacbell.net>
Subject: Re: Totally broken PCI PM calls
Date: Fri, 15 Oct 2004 15:59:55 +0200 [thread overview]
Message-ID: <20041015135955.GD2015@elf.ucw.cz> (raw)
In-Reply-To: <Pine.LNX.4.58.0410110857180.3897@ppc970.osdl.org>
Hi!
> > Does sparse now have typechecking on enums?
>
> You can mark an enum "bitwise" (by making all of it's values be
> "bitwise"), and it will be considered a type of its own, yes. But then you
> also cannot do arithmetic on it (which _usually_ is what you want, but not
> necessarily always).
>
> (You'd also need to pass in the "-Wbitwise" flag to sparse, to get the
> checks).
>
> By the time you mark something "bitwise", you don't even need to use an
> enum, btw. You can just do a regular integer typedef and mark the typedef
> to be "bitwise" - that generates a unique type right there. That's what
> the endianness checking does.
I'm trying to learn how to work with bitwise on obsolete stuff, but
checking there is good, too, right?
Is this right way to do it?
+typedef enum pm_request __bitwise {
+ __bitwise PM_SUSPEND, /* enter D1-D3 */
+ __bitwise PM_RESUME, /* enter D0 */
+} pm_request_t;
+
+/*
+ * Device types... these are passed to pm_register
+ */
+typedef enum pm_dev_type __bitwise {
+ __bitwise PM_UNKNOWN_DEV = 0, /* generic */
+ __bitwise PM_SYS_DEV, /* system device (fan, KB
controller, ...) */
+ __bitwise PM_PCI_DEV, /* PCI device */
+ __bitwise PM_USB_DEV, /* USB device */
+ __bitwise PM_SCSI_DEV, /* SCSI device */
+ __bitwise PM_ISA_DEV, /* ISA device */
+ __bitwise PM_MTD_DEV, /* Memory Technology Device */
+} pm_dev_t;
Having __bitwise at every line in enum looks quite ugly to my
eyes. [Where to get sparse? I tried to google for it but "sparse" is
very common word (as in sparse matrix). And theres no
kernel/people/linus on kernel.org...]
Pavel
--
People were complaining that M$ turns users into beta-testers...
...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!
next prev parent reply other threads:[~2004-10-15 14:09 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-11 0:45 Totally broken PCI PM calls Benjamin Herrenschmidt
2004-10-11 2:41 ` Linus Torvalds
2004-10-11 3:42 ` Paul Mackerras
2004-10-11 4:04 ` Linus Torvalds
2004-10-11 4:24 ` Paul Mackerras
2004-10-11 9:57 ` Pavel Machek
2004-10-11 14:42 ` Linus Torvalds
2004-10-11 14:56 ` suspend-to-RAM [was Re: Totally broken PCI PM calls] Pavel Machek
2004-10-11 15:30 ` Linus Torvalds
2004-10-11 17:39 ` Olivier Galibert
2004-10-11 18:21 ` Pavel Machek
2004-10-11 15:53 ` Brice Goglin
2004-10-11 16:17 ` Pavel Machek
2004-10-11 17:09 ` Brice Goglin
2004-10-11 18:23 ` Pavel Machek
2004-10-11 18:40 ` Brice Goglin
2004-10-11 16:47 ` Totally broken PCI PM calls David Brownell
2004-10-11 22:28 ` Benjamin Herrenschmidt
2004-10-11 22:58 ` Dmitry Torokhov
2004-10-11 23:08 ` Benjamin Herrenschmidt
2004-10-12 3:00 ` David Brownell
2004-10-12 4:09 ` Dmitry Torokhov
2004-10-12 16:56 ` David Brownell
2004-10-12 9:27 ` Russell King
2004-10-12 11:24 ` Benjamin Herrenschmidt
2004-10-11 4:25 ` Linus Torvalds
2004-10-11 10:18 ` Pavel Machek
2004-10-11 10:54 ` Benjamin Herrenschmidt
2004-10-11 16:01 ` Linus Torvalds
2004-10-15 13:59 ` Pavel Machek [this message]
2004-10-15 15:56 ` Linus Torvalds
2004-10-24 20:58 ` Pavel Machek
2004-10-24 21:18 ` Linus Torvalds
2004-10-11 16:36 ` David Brownell
2004-10-11 21:17 ` Nigel Cunningham
2004-10-11 21:37 ` David Brownell
2004-10-11 22:12 ` Stefan Seyfried
2004-10-12 2:59 ` David Brownell
2004-10-12 8:54 ` Pavel Machek
2004-10-12 10:32 ` Stefan Seyfried
2004-10-12 18:28 ` David Brownell
2004-10-12 20:28 ` Stefan Seyfried
2004-10-13 13:34 ` David Brownell
2004-10-12 1:24 ` Nigel Cunningham
2004-10-12 8:53 ` Pavel Machek
2004-10-12 18:52 ` David Brownell
2004-10-12 19:50 ` Pavel Machek
2004-10-12 22:13 ` Benjamin Herrenschmidt
2004-10-12 22:35 ` David Brownell
2004-10-11 22:26 ` Benjamin Herrenschmidt
2004-10-11 3:45 ` Benjamin Herrenschmidt
2004-10-11 4:08 ` Linus Torvalds
2004-10-11 4:23 ` Benjamin Herrenschmidt
2004-10-11 4:32 ` Linus Torvalds
2004-10-11 4:55 ` Benjamin Herrenschmidt
2004-10-11 16:15 ` David Brownell
2004-10-11 22:22 ` Benjamin Herrenschmidt
2004-10-12 2:46 ` David Brownell
2004-10-12 4:02 ` Benjamin Herrenschmidt
2004-10-12 10:49 ` Nigel Cunningham
2004-10-12 11:27 ` Benjamin Herrenschmidt
2004-10-12 11:38 ` Nigel Cunningham
2004-10-12 11:51 ` Pavel Machek
2004-10-11 10:08 ` Pavel Machek
2004-10-11 9:51 ` Pavel Machek
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