Document: add MAX_IO_BLOCK_DEVICES platform macro
Add MAX_IO_BLOCK_DEVICES in porting guide. It's necessary to define this macro to support io block device. With this macro, multiple block devices could be opened at the same time. Each block device stores its own state. Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org> |
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docs/porting-guide.md |
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