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In Linux, the memory returned by kmalloc() is DMA-capable.
However, it is not true in U-Boot.
At a glance, kmalloc() in U-Boot returns address aligned with
ARCH_DMA_MINALIGN. However, it never pads the allocated memory.
This half-way house is completely useless because calling kmalloc()
and malloc() in this order causes a cache sharing problem.
Change the implementation to call malloc_cache_aligned(), which
allocates really DMA-capable memory.
Signed-off-by: Masahiro Yamada <[email protected]>
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Currently, kzalloc() returns zero-filled memory, while kmalloc()
simply ignores the second argument and never fills the memory
area with zeros.
I want kmalloc(size, __GFP_ZERO) to behave as kzalloc() does,
which will make it easier to add more memory allocator variants.
With the introduction of __GFP_ZERO flag, going forward, kzmalloc()
variants can fall back to kmalloc() enabling the __GFP_ZERO flag.
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Heiko Schocher <[email protected]>
Acked-by: Simon Glass <[email protected]>
Reviewed-by: Lukasz Majewski <[email protected]>
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The vzalloc(size) is equivalent to kzalloc(size, 0). Move it to
include/linux/compat.h as an inline function in order to avoid the
function call overhead.
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Heiko Schocher <[email protected]>
Acked-by: Simon Glass <[email protected]>
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- move linux specific defines from usb and video code
into linux/compat.h
- move common linux specific defines from include/ubi_uboot.h
to linux/compat.h
- add for new mtd/ubi/ubifs sync new needed linux specific
defines to linux/compat.h
Signed-off-by: Heiko Schocher <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Anatolij Gustschin <[email protected]>
[trini: Add spin_lock_irqsave/spin_unlock_irqrestore dummies from
usb/lin_gadet_compat.h]
Signed-off-by: Tom Rini <[email protected]>
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