linux.git/arch/powerpc/kernel/nvram_64.c, branch v4.3

powerpc/nvram: print no error when pstore backend is not nvram

2015-08-19T06:14:21+00:00

Pstore only supports one backend at a time. The preferred
pstore backend is set by passing the pstore.backend=
argument to the kernel at boot time. Currently, while trying
to register with pstore, nvram throws an error message even
when "pstore.backend != nvram", which is unnecessary. This
patch removes the error message in case "pstore.backend != nvram".

Signed-off-by: Hari Bathini 
Signed-off-by: Michael Ellerman

powerpc/nvram: use kmemdup rather than duplicating its implementation

2015-08-18T09:34:43+00:00

The patch was generated using fixed coccinelle semantic patch
scripts/coccinelle/api/memdup.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2014320

Signed-off-by: Andrzej Hajda 
Reviewed-by: Nathan Fontenot 
Signed-off-by: Michael Ellerman

powerpc/rtas: Make timestamp related code y2038-safe

2015-03-23T03:06:11+00:00

While we are here, let us make timestamp related code y2038-safe.

Suggested-by: Arnd Bergmann 
Signed-off-by: Hari Bathini 
Signed-off-by: Michael Ellerman

powerpc/powernv: Add pstore support on powernv

2015-03-23T03:06:10+00:00

This patch extends pstore, a generic interface to platform dependent
persistent storage, support for powernv  platform to capture certain
useful information, during dying moments. Such support is already in
place for  pseries platform. This patch re-uses most of that code.

It is a common practice to compile kernels with both CONFIG_PPC_PSERIES=y
and CONFIG_PPC_POWERNV=y. The code in nvram_init_oops_partition() routine
still works as intended, as the caller is platform specific code which
passes the appropriate value for "rtas_partition_exists" parameter.
In all other places, where CONFIG_PPC_PSERIES or CONFIG_PPC_POWERNV
flag is used in this patchset, it is to reduce the kernel size in cases
where this flag is not set and doesn't have any impact logic wise.

Signed-off-by: Hari Bathini 
Signed-off-by: Michael Ellerman

powerpc/nvram: Move generic code for nvram and pstore

2015-03-23T03:05:49+00:00

With minor checks, we can move most of the code for nvram
under pseries to a common place to be re-used by other
powerpc platforms like powernv. This patch moves such
common code to arch/powerpc/kernel/nvram_64.c file.

Signed-off-by: Hari Bathini 
[mpe: Move select of ZLIB_DEFLATE to PPC64 to fix the build]
Signed-off-by: Michael Ellerman

powerpc: Make a bunch of things static

2014-09-25T13:14:41+00:00

Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflow

2013-11-25T00:50:57+00:00

for tmp_part->header.name:
    it is "Terminating null required only for names < 12 chars".
    so need to limit the %.12s for it in printk

  additional info:

    %12s  limit the width, not for the original string output length
          if name length is more than 12, it still can be fully displayed.
          if name length is less than 12, the ' ' will be filled before name.

    %.12s truly limit the original string output length (precision)

Signed-off-by: Chen Gang 
Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: Fix endian issue when using the partition length

2013-10-31T01:37:28+00:00

When reading partitions, the length has to be translated from
big endian to the endian order of the host. Similarly, when writing
partitions, the length needs to be in big endian order.

The userspace tool 'nvram' needs a similar fix as it is reading
and writing partitions through /dev/nram :

    http://sourceforge.net/p/powerpc-utils/mailman/message/31571277/

Signed-off-by: Cedric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram64: Need return the related error code on failure occurs

2013-07-01T01:46:56+00:00

When error occurs, need return the related error code to let upper
caller know about it.

ppc_md.nvram_size() can return the error code (e.g. core99_nvram_size()
in 'arch/powerpc/platforms/powermac/nvram.c').

Also set ret value when only need it, so can save structions for normal
cases.

Signed-off-by: Chen Gang 
Signed-off-by: Benjamin Herrenschmidt

powerpc: remove cast for kmalloc/kzalloc return value

2013-03-18T13:16:00+00:00

remove cast for kmalloc/kzalloc return value.

Signed-off-by: Zhang Yanfei 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Andrew Morton 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Jiri Kosina