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Groups > linux.kernel > #1496711
| From | Joe Perches <joe@perches.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel |
| Date | 2016-10-06 17:50 +0200 |
| Message-ID | <spj5L-2ak-1@gated-at.bofh.it> (permalink) |
| References | (3 earlier) <soZTs-5Rt-29@gated-at.bofh.it> <soZTs-5Rt-31@gated-at.bofh.it> <spdto-6Li-43@gated-at.bofh.it> <spfbQ-7Yg-23@gated-at.bofh.it> <spgAW-wz-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, 2016-10-06 at 13:00 +0000, David Laight wrote: > From: Joe Perches > > Sent: 06 October 2016 12:39 > > On Thu, 2016-10-06 at 09:41 +0000, David Laight wrote: > > > From: Joe Perches > > > > No worries, and bool is the same ,size as u8. > > > That is not guaranteed at all. > > > One of the ARM ABI defined bool to be the size of int. > > Really? What kernel has sizeof(_Bool) != 1 ? > Probably none, but I know systems have used larger bool. > I found this: > > with egcs-2.90.29 980515 (egcs-1.0.3 release) on alphaev56-dec-osf4.0d > > bool = 8 > > short = 2 > > int = 4 > > long = 8 It's likely there are probably DSPs and old TOPS-20/CDC-6400 systems where sizeof(u16) isn't 2 as well. I think linux isn't likely to be ported successfully to those platforms. No matter. If bool isn't desired because some future expansion to this is likely and memory needs to be conserved, fine, use a bitfield. It can be slower than bool because it can be RMW. cheers, Joe
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[PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Pavel Machek <pavel@ucw.cz> - 2016-10-03 11:00 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Marcel Holtmann <marcel@holtmann.org> - 2016-10-05 13:20 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Joe Perches <joe@perches.com> - 2016-10-05 20:00 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Pavel Machek <pavel@ucw.cz> - 2016-10-05 21:20 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Joe Perches <joe@perches.com> - 2016-10-05 21:20 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Pavel Machek <pavel@ucw.cz> - 2016-10-06 00:20 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Joe Perches <joe@perches.com> - 2016-10-06 00:30 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Pavel Machek <pavel@ucw.cz> - 2016-10-06 09:10 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Joe Perches <joe@perches.com> - 2016-10-06 09:10 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Johan Hedberg <johan.hedberg@gmail.com> - 2016-10-06 10:40 +0200
RE: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel David Laight <David.Laight@ACULAB.COM> - 2016-10-06 11:50 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Joe Perches <joe@perches.com> - 2016-10-06 13:40 +0200
RE: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel David Laight <David.Laight@ACULAB.COM> - 2016-10-06 15:10 +0200
Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Joe Perches <joe@perches.com> - 2016-10-06 17:50 +0200
[PATCHv2] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Pavel Machek <pavel@ucw.cz> - 2016-10-05 23:00 +0200
Re: [PATCHv2] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel Marcel Holtmann <marcel@holtmann.org> - 2016-10-06 00:00 +0200
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