[PATCH v3 5/5] RISC-V: Avoid corrupting the upper 32-bit of phys_addr_t in ioremap

Christoph Hellwig hch at infradead.org
Tue Oct 2 07:51:16 PDT 2018


On Tue, Oct 02, 2018 at 04:52:31PM +0800, Zong Li wrote:
> From: Vincent Chen <vincentc at andestech.com>
> 
> For 32bit, the upper 32-bit of phys_addr_t will be flushed to zero
> after AND with PAGE_MASK because the data type of PAGE_MASK is
> unsigned long. To fix this problem, the page alignment is done by
> subtracting the page offset instead of AND with PAGE_MASK.
> 
> Signed-off-by: Vincent Chen <vincentc at andestech.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>

(and I'm pretty sure I reviewed this before..)



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