u-boot.git/lib/linux_compat.c, branch v2020.10-rc4

common: Drop net.h from common header

2020-05-18T21:33:31+00:00

Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass

dm: core: Create a new header file for 'compat' features

2020-02-06T02:33:46+00:00

At present dm/device.h includes the linux-compatible features. This
requires including linux/compat.h which in turn includes a lot of headers.
One of these is malloc.h which we thus end up including in every file in
U-Boot. Apart from the inefficiency of this, it is problematic for sandbox
which needs to use the system malloc() in some files.

Move the compatibility features into a separate header file.

Signed-off-by: Simon Glass

linux_compat: move kmemdup() from ubifs.c to linux_compat.c

2019-12-06T21:44:19+00:00

linux_compat.c is the best place for kmemdup(), which is currenly used
only in ubifs.c, but will also be used when other kernel files
(in my case, lib/crypto/x509_cert_parser.c and pkcs7_parser.c) will be
imported. So just move it.

Signed-off-by: AKASHI Takahiro 
Reviewed-by: Heinrich Schuchardt

linux_compat: fix potential NULL pointer access

2019-10-31T11:22:53+00:00

malloc_cache_aligned() might return zero, so fix potential NULL pointer
access if __GFP_ZERO flag is set.

Signed-off-by: Marek Szyprowski 
Reviewed-by: Ralph Siemsen

Make kmalloc'ed memory really DMA-safe

2018-08-31T15:59:44+00:00

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

linux_compat: handle __GFP_ZERO in kmalloc()

2015-07-22T13:30:44+00:00

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 
Reviewed-by: Heiko Schocher 
Acked-by: Simon Glass 
Reviewed-by: Lukasz Majewski

linux_compat: move vzalloc() to header file as an inline function

2015-07-22T13:30:39+00:00

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 
Reviewed-by: Heiko Schocher 
Acked-by: Simon Glass

lib, linux: move linux specific defines to linux/compat.h

2014-08-25T23:25:03+00:00

- 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 
Cc: Marek Vasut 
Cc: Anatolij Gustschin 
[trini: Add spin_lock_irqsave/spin_unlock_irqrestore dummies from
usb/lin_gadet_compat.h]
Signed-off-by: Tom Rini