Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [RFC][PATCH 2/2] ARM: ioremap: Add IO mapping space reused support. | Date | Mon, 12 May 2014 09:51:41 +0200 |
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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@gmail.com>
What happens if the first driver then unmaps the area?
Arnd
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