| 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 linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <CAHPCO9FRfR5p1N5v7mUk4hUYdPvqfLN6nW1LcnC83sU86ZFbZA@mail.gmail.com> Date: Tue, 13 May 2014 09:45:08 +0800 From: Richard Lee <superlibj8301@...il.com> To: Arnd Bergmann <arnd@...db.de> Cc: linux-arm-kernel@...ts.infradead.org, linux@....linux.org.uk, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Richard Lee <superlibj@...il.com> Subject: Re: [RFC][PATCH 2/2] ARM: ioremap: Add IO mapping space reused support. > On Mon, May 12, 2014 at 3:51 PM, Arnd Bergmann <arnd@...db.de> wrote: > On Monday 12 May 2014 10:19:55 Richard Lee wrote: >> For the IO mapping, for the same physical address space maybe >> mapped more than one time, for example, in some SoCs: >> 0x20000000 ~ 0x20001000: are global control IO physical map, >> and this range space will be used by many drivers. >> And then if each driver will do the same ioremap operation, we >> will waste to much malloc virtual spaces. >> >> This patch add IO mapping space reused support. >> >> Signed-off-by: Richard Lee <superlibj@...il.com> > > What happens if the first driver then unmaps the area? > If the first driver will unmap the area, it shouldn't do any thing except decreasing the 'used' counter. Thanks, BRs Richard Lee > Arnd -- 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/
Powered by blists - more mailing lists