fdt_node_offset_by_prop_value() returns a negative error code on
failure - fix the check accordingly.

Fixes: 2a2c74b2efcb ("IBM Akebono: Add the Akebono platform")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260702211554.56923-6-thorsten.blum@linux.dev

fdt_node_offset_by_prop_value() returns a negative error code on
failure - fix the check accordingly.

Fixes: 228d55053397 ("powerpc/47x: Add support for the new IBM currituck platform")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260702211554.56923-5-thorsten.blum@linux.dev

fdt_node_offset_by_prop_value() returns a negative error code on
failure - fix the check accordingly.

Fixes: d2477b5cc8ca ("[POWERPC] bootwrapper: Add a firmware-independent simpleboot target.")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260702211554.56923-4-thorsten.blum@linux.dev

Pull strncpy removal from Kees Cook:

 - Remove the per-arch strncpy implementations in alpha, m68k, powerpc,
   x86, and xtensa

 - Remove strncpy API

   Over the last 6 years working on strncpy removal there were 362
   commits by 70 contributors. Folks with more than 1 commit were:

    211  Justin Stitt <justinstitt@google.com>
     22  Xu Panda <xu.panda@zte.com.cn>
     21  Kees Cook <kees@kernel.org>
     17  Thorsten Blum <thorsten.blum@linux.dev>
     12  Arnd Bergmann <arnd@arndb.de>
      4  Pranav Tyagi <pranav.tyagi03@gmail.com>
      4  Lee Jones <lee@kernel.org>
      2  Steven Rostedt <rostedt@goodmis.org>
      2  Sam Ravnborg <sam@ravnborg.org>
      2  Marcelo Moreira <marcelomoreira1905@gmail.com>
      2  Krzysztof Kozlowski <krzk@kernel.org>
      2  Kalle Valo <kvalo@kernel.org>
      2  Jaroslav Kysela <perex@perex.cz>
      2  Daniel Thompson <danielt@kernel.org>
      2  Andrew Lunn <andrew@lunn.ch>

* tag 'strncpy-removal-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  string: Remove strncpy() from the kernel
  xtensa: Remove arch-specific strncpy() implementation
  x86: Remove arch-specific strncpy() implementation
  powerpc: Remove arch-specific strncpy() implementation
  m68k: Remove arch-specific strncpy() implementation
  alpha: Remove arch-specific strncpy() implementation

strncpy() has no remaining callers in the kernel[1]. Remove the
powerpc-specific assembly implementation from both the kernel
(arch/powerpc/lib/string.S) and the boot wrapper
(arch/powerpc/boot/string.S), along with the __HAVE_ARCH_STRNCPY
define and declaration, falling back to the generic version in
lib/string.c.

The boot wrapper's strncpy had no callers in arch/powerpc/boot/.

Link: https://github.com/KSPP/linux/issues/90 [1]
Signed-off-by: Kees Cook <kees@kernel.org>

Binutils 2.46 changed the default linker behavior from '-z notext' to
'-z text', which treats dynamic relocations in read-only segments as
errors rather than warnings. This causes the pseries boot wrapper build
to fail with:

  /usr/bin/ld.bfd: arch/powerpc/boot/wrapper.a(crt0.o): warning:
    relocation against `_platform_stack_top' in read-only section `.text'
  /usr/bin/ld.bfd: error: read-only segment has dynamic relocations

The pseries wrapper uses '-pie' to create position-independent code.
However, crt0.S contains a pointer to '_platform_stack_top' in the .text
section, which requires a dynamic relocation at runtime. This creates
DT_TEXTREL (text relocations), which were allowed by default in binutils
2.45 and earlier (via implicit '-z notext') but are now rejected by
binutils 2.46+.

Add '-z notext' linker flag to explicitly allow text relocations for
the pseries platform, similar to what is already done for the epapr
platform. This restores the previous behavior and allows the boot
wrapper to build successfully with binutils 2.46+.

Signed-off-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Tested-by: Anushree Mathur <anushree.mathur@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260525161601.32097-1-amachhiw@linux.ibm.com

Indent several struct members using tabs instead of spaces.

Replace the typedef alias AOUTHDR with an explicit struct name to
silence a checkpatch warning.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250517125834.421088-2-thorsten.blum@linux.dev

Follow the same approach as other architectures such as Arm or RISC-V,
and build devicetrees based on platforms selected in Kconfig. This makes
it unnecessary to use CONFIG_OF_ALL_DTBS on PowerPC in order to build
DTB files.

This makes it easier to use other build and test infrastructure such as
`make dtbs_check`, and is a first step towards generating FIT images
that include all the relevant DTBs with `make image.fit`.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260315-mpc83xx-dtb-v4-1-243849be4280@posteo.net

These are the remaining PowerPC devicetrees that do not have a /model
property, even though it is required by the devicetree specification.
Fix them by simply copying the compatible string.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260313-ppc-model-v1-2-bf19b3d1b65d@posteo.net

The mpc8315erdb devicetree did thus far not have a /model property, even
though it is required by the devicetree specification.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260313-ppc-model-v1-1-bf19b3d1b65d@posteo.net