u-boot/lib/linux_compat.c
Masahiro Yamada 6b9f9eadff linux_compat: handle __GFP_ZERO in kmalloc()
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 <yamada.masahiro@socionext.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
2015-07-22 07:30:44 -06:00

42 lines
716 B
C

#include <common.h>
#include <linux/compat.h>
struct p_current cur = {
.pid = 1,
};
__maybe_unused struct p_current *current = &cur;
unsigned long copy_from_user(void *dest, const void *src,
unsigned long count)
{
memcpy((void *)dest, (void *)src, count);
return 0;
}
void *kmalloc(size_t size, int flags)
{
void *p;
p = memalign(ARCH_DMA_MINALIGN, size);
if (flags & __GFP_ZERO)
memset(p, 0, size);
return p;
}
struct kmem_cache *get_mem(int element_sz)
{
struct kmem_cache *ret;
ret = memalign(ARCH_DMA_MINALIGN, sizeof(struct kmem_cache));
ret->sz = element_sz;
return ret;
}
void *kmem_cache_alloc(struct kmem_cache *obj, int flag)
{
return memalign(ARCH_DMA_MINALIGN, obj->sz);
}