arch/powerpc/boot/decompress.c:132: undefined reference to `_

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* arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
@ 2026-05-22  7:32 kernel test robot
  0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2026-05-22  7:32 UTC (permalink / raw)
  To: Alan Maguire; +Cc: oe-kbuild-all, linux-kernel, Andrii Nakryiko

Hi Alan,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6779b50faa562e6cca1aa6a4649a4d764c6c7e28
commit: 222edc843c158666d2d71793b4b7d0bbb9801883 btf: Add BTF kind layout encoding to UAPI
date:   8 weeks ago
config: powerpc-randconfig-r051-20260522 (https://download.01.org/0day-ci/archive/20260522/202605221550.2oCkaKKo-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260522/202605221550.2oCkaKKo-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: 222edc843c15 ("btf: Add BTF kind layout encoding to UAPI")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605221550.2oCkaKKo-lkp@intel.com/

All errors (new ones prefixed by >>):

   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'


vim +132 arch/powerpc/boot/decompress.c

1b7898ee276b39 Oliver O'Halloran 2016-09-22   97  
1b7898ee276b39 Oliver O'Halloran 2016-09-22   98  /**
1b7898ee276b39 Oliver O'Halloran 2016-09-22   99   * partial_decompress - decompresses part or all of a compressed buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  100   * @inbuf:       input buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  101   * @input_size:  length of the input buffer
930a77c3ad79c3 Zhang Jianhua     2021-05-10  102   * @outbuf:      output buffer
930a77c3ad79c3 Zhang Jianhua     2021-05-10  103   * @output_size: length of the output buffer
6efc2f1a64ef62 Yang Li           2024-04-08  104   * @_skip:       number of output bytes to ignore
1b7898ee276b39 Oliver O'Halloran 2016-09-22  105   *
1b7898ee276b39 Oliver O'Halloran 2016-09-22  106   * This function takes compressed data from inbuf, decompresses and write it to
1b7898ee276b39 Oliver O'Halloran 2016-09-22  107   * outbuf. Once output_size bytes are written to the output buffer, or the
1b7898ee276b39 Oliver O'Halloran 2016-09-22  108   * stream is exhausted the function will return the number of bytes that were
1b7898ee276b39 Oliver O'Halloran 2016-09-22  109   * decompressed. Otherwise it will return whatever error code the decompressor
1b7898ee276b39 Oliver O'Halloran 2016-09-22  110   * reported (NB: This is specific to each decompressor type).
1b7898ee276b39 Oliver O'Halloran 2016-09-22  111   *
1b7898ee276b39 Oliver O'Halloran 2016-09-22  112   * The skip functionality is mainly there so the program and discover
1b7898ee276b39 Oliver O'Halloran 2016-09-22  113   * the size of the compressed image so that it can ask firmware (if present)
1b7898ee276b39 Oliver O'Halloran 2016-09-22  114   * for an appropriately sized buffer.
1b7898ee276b39 Oliver O'Halloran 2016-09-22  115   */
1b7898ee276b39 Oliver O'Halloran 2016-09-22  116  long partial_decompress(void *inbuf, unsigned long input_size,
1b7898ee276b39 Oliver O'Halloran 2016-09-22  117  	void *outbuf, unsigned long output_size, unsigned long _skip)
1b7898ee276b39 Oliver O'Halloran 2016-09-22  118  {
1b7898ee276b39 Oliver O'Halloran 2016-09-22  119  	int ret;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  120  
1b7898ee276b39 Oliver O'Halloran 2016-09-22  121  	/*
1b7898ee276b39 Oliver O'Halloran 2016-09-22  122  	 * The skipped bytes needs to be included in the size of data we want
1b7898ee276b39 Oliver O'Halloran 2016-09-22  123  	 * to decompress.
1b7898ee276b39 Oliver O'Halloran 2016-09-22  124  	 */
1b7898ee276b39 Oliver O'Halloran 2016-09-22  125  	output_size += _skip;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  126  
1b7898ee276b39 Oliver O'Halloran 2016-09-22  127  	decompressed_bytes = 0;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  128  	output_buffer = outbuf;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  129  	limit = output_size;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  130  	skip = _skip;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  131  
1b7898ee276b39 Oliver O'Halloran 2016-09-22 @132  	ret = __decompress(inbuf, input_size, NULL, flush, outbuf,

:::::: The code at line 132 was first introduced by commit
:::::: 1b7898ee276b39e54d870dc4ef3374f663d0b426 powerpc/boot: Use the pre-boot decompression API

:::::: TO: Oliver O'Halloran <oohall@gmail.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

^ permalink raw reply	[flat|nested] 4+ messages in thread

* arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
@ 2026-02-14 13:13 kernel test robot
  0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2026-02-14 13:13 UTC (permalink / raw)
  To: Guenter Roeck; +Cc: oe-kbuild-all, linux-kernel, Daniel Lezcano, Jon Hunter

Hi Guenter,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   770aaedb461a055f79b971d538678942b6607894
commit: 916aa36042db8ee230543ffe0d192f900e8b8c9f clocksource/drivers/timer-tegra186: Avoid 64-bit divide operation
date:   5 months ago
config: powerpc-randconfig-r052-20260214 (https://download.01.org/0day-ci/archive/20260214/202602142140.yi7s2ZLa-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260214/202602142140.yi7s2ZLa-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602142140.yi7s2ZLa-lkp@intel.com/

All errors (new ones prefixed by >>):

   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'


vim +132 arch/powerpc/boot/decompress.c

1b7898ee276b39e Oliver O'Halloran 2016-09-22   97  
1b7898ee276b39e Oliver O'Halloran 2016-09-22   98  /**
1b7898ee276b39e Oliver O'Halloran 2016-09-22   99   * partial_decompress - decompresses part or all of a compressed buffer
1b7898ee276b39e Oliver O'Halloran 2016-09-22  100   * @inbuf:       input buffer
1b7898ee276b39e Oliver O'Halloran 2016-09-22  101   * @input_size:  length of the input buffer
930a77c3ad79c30 Zhang Jianhua     2021-05-10  102   * @outbuf:      output buffer
930a77c3ad79c30 Zhang Jianhua     2021-05-10  103   * @output_size: length of the output buffer
6efc2f1a64ef62f Yang Li           2024-04-08  104   * @_skip:       number of output bytes to ignore
1b7898ee276b39e Oliver O'Halloran 2016-09-22  105   *
1b7898ee276b39e Oliver O'Halloran 2016-09-22  106   * This function takes compressed data from inbuf, decompresses and write it to
1b7898ee276b39e Oliver O'Halloran 2016-09-22  107   * outbuf. Once output_size bytes are written to the output buffer, or the
1b7898ee276b39e Oliver O'Halloran 2016-09-22  108   * stream is exhausted the function will return the number of bytes that were
1b7898ee276b39e Oliver O'Halloran 2016-09-22  109   * decompressed. Otherwise it will return whatever error code the decompressor
1b7898ee276b39e Oliver O'Halloran 2016-09-22  110   * reported (NB: This is specific to each decompressor type).
1b7898ee276b39e Oliver O'Halloran 2016-09-22  111   *
1b7898ee276b39e Oliver O'Halloran 2016-09-22  112   * The skip functionality is mainly there so the program and discover
1b7898ee276b39e Oliver O'Halloran 2016-09-22  113   * the size of the compressed image so that it can ask firmware (if present)
1b7898ee276b39e Oliver O'Halloran 2016-09-22  114   * for an appropriately sized buffer.
1b7898ee276b39e Oliver O'Halloran 2016-09-22  115   */
1b7898ee276b39e Oliver O'Halloran 2016-09-22  116  long partial_decompress(void *inbuf, unsigned long input_size,
1b7898ee276b39e Oliver O'Halloran 2016-09-22  117  	void *outbuf, unsigned long output_size, unsigned long _skip)
1b7898ee276b39e Oliver O'Halloran 2016-09-22  118  {
1b7898ee276b39e Oliver O'Halloran 2016-09-22  119  	int ret;
1b7898ee276b39e Oliver O'Halloran 2016-09-22  120  
1b7898ee276b39e Oliver O'Halloran 2016-09-22  121  	/*
1b7898ee276b39e Oliver O'Halloran 2016-09-22  122  	 * The skipped bytes needs to be included in the size of data we want
1b7898ee276b39e Oliver O'Halloran 2016-09-22  123  	 * to decompress.
1b7898ee276b39e Oliver O'Halloran 2016-09-22  124  	 */
1b7898ee276b39e Oliver O'Halloran 2016-09-22  125  	output_size += _skip;
1b7898ee276b39e Oliver O'Halloran 2016-09-22  126  
1b7898ee276b39e Oliver O'Halloran 2016-09-22  127  	decompressed_bytes = 0;
1b7898ee276b39e Oliver O'Halloran 2016-09-22  128  	output_buffer = outbuf;
1b7898ee276b39e Oliver O'Halloran 2016-09-22  129  	limit = output_size;
1b7898ee276b39e Oliver O'Halloran 2016-09-22  130  	skip = _skip;
1b7898ee276b39e Oliver O'Halloran 2016-09-22  131  
1b7898ee276b39e Oliver O'Halloran 2016-09-22 @132  	ret = __decompress(inbuf, input_size, NULL, flush, outbuf,

:::::: The code at line 132 was first introduced by commit
:::::: 1b7898ee276b39e54d870dc4ef3374f663d0b426 powerpc/boot: Use the pre-boot decompression API

:::::: TO: Oliver O'Halloran <oohall@gmail.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

^ permalink raw reply	[flat|nested] 4+ messages in thread

* arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
@ 2026-01-11 13:42 kernel test robot
  0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2026-01-11 13:42 UTC (permalink / raw)
  To: Arnd Bergmann; +Cc: oe-kbuild-all, linux-kernel, Hans Verkuil

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   755bc1335e3b116b702205b72eb57b7b8aef2bb2
commit: 8d46603eeeb4c6abff1d2e49f2a6ae289dac765e media: cxd2841er: fix 64-bit division on gcc-9
date:   1 year, 1 month ago
config: powerpc-randconfig-r063-20260111 (https://download.01.org/0day-ci/archive/20260111/202601112156.tjNlDnmO-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260111/202601112156.tjNlDnmO-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601112156.tjNlDnmO-lkp@intel.com/

All errors (new ones prefixed by >>):

   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for HOTPLUG_CPU
   Depends on [n]: SMP [=y] && (PPC_PSERIES [=n] || PPC_PMAC [=n] || PPC_POWERNV [=n] || FSL_SOC_BOOKE [=n])
   Selected by [y]:
   - PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y]


vim +132 arch/powerpc/boot/decompress.c

1b7898ee276b39 Oliver O'Halloran 2016-09-22   97  
1b7898ee276b39 Oliver O'Halloran 2016-09-22   98  /**
1b7898ee276b39 Oliver O'Halloran 2016-09-22   99   * partial_decompress - decompresses part or all of a compressed buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  100   * @inbuf:       input buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  101   * @input_size:  length of the input buffer
930a77c3ad79c3 Zhang Jianhua     2021-05-10  102   * @outbuf:      output buffer
930a77c3ad79c3 Zhang Jianhua     2021-05-10  103   * @output_size: length of the output buffer
6efc2f1a64ef62 Yang Li           2024-04-08  104   * @_skip:       number of output bytes to ignore
1b7898ee276b39 Oliver O'Halloran 2016-09-22  105   *
1b7898ee276b39 Oliver O'Halloran 2016-09-22  106   * This function takes compressed data from inbuf, decompresses and write it to
1b7898ee276b39 Oliver O'Halloran 2016-09-22  107   * outbuf. Once output_size bytes are written to the output buffer, or the
1b7898ee276b39 Oliver O'Halloran 2016-09-22  108   * stream is exhausted the function will return the number of bytes that were
1b7898ee276b39 Oliver O'Halloran 2016-09-22  109   * decompressed. Otherwise it will return whatever error code the decompressor
1b7898ee276b39 Oliver O'Halloran 2016-09-22  110   * reported (NB: This is specific to each decompressor type).
1b7898ee276b39 Oliver O'Halloran 2016-09-22  111   *
1b7898ee276b39 Oliver O'Halloran 2016-09-22  112   * The skip functionality is mainly there so the program and discover
1b7898ee276b39 Oliver O'Halloran 2016-09-22  113   * the size of the compressed image so that it can ask firmware (if present)
1b7898ee276b39 Oliver O'Halloran 2016-09-22  114   * for an appropriately sized buffer.
1b7898ee276b39 Oliver O'Halloran 2016-09-22  115   */
1b7898ee276b39 Oliver O'Halloran 2016-09-22  116  long partial_decompress(void *inbuf, unsigned long input_size,
1b7898ee276b39 Oliver O'Halloran 2016-09-22  117  	void *outbuf, unsigned long output_size, unsigned long _skip)
1b7898ee276b39 Oliver O'Halloran 2016-09-22  118  {
1b7898ee276b39 Oliver O'Halloran 2016-09-22  119  	int ret;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  120  
1b7898ee276b39 Oliver O'Halloran 2016-09-22  121  	/*
1b7898ee276b39 Oliver O'Halloran 2016-09-22  122  	 * The skipped bytes needs to be included in the size of data we want
1b7898ee276b39 Oliver O'Halloran 2016-09-22  123  	 * to decompress.
1b7898ee276b39 Oliver O'Halloran 2016-09-22  124  	 */
1b7898ee276b39 Oliver O'Halloran 2016-09-22  125  	output_size += _skip;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  126  
1b7898ee276b39 Oliver O'Halloran 2016-09-22  127  	decompressed_bytes = 0;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  128  	output_buffer = outbuf;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  129  	limit = output_size;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  130  	skip = _skip;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  131  
1b7898ee276b39 Oliver O'Halloran 2016-09-22 @132  	ret = __decompress(inbuf, input_size, NULL, flush, outbuf,

:::::: The code at line 132 was first introduced by commit
:::::: 1b7898ee276b39e54d870dc4ef3374f663d0b426 powerpc/boot: Use the pre-boot decompression API

:::::: TO: Oliver O'Halloran <oohall@gmail.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

^ permalink raw reply	[flat|nested] 4+ messages in thread

* arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
@ 2023-08-17  8:51 kernel test robot
  0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2023-08-17  8:51 UTC (permalink / raw)
  To: Justin Swartz; +Cc: oe-kbuild-all, linux-kernel, Jonathan Corbet

Hi Justin,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6
commit: 788183a6e8b098b90e15214e800ae5194591018a docs: usb: fix literal block marker in usbmon verification example
date:   1 year, 2 months ago
config: powerpc-randconfig-r005-20230816 (https://download.01.org/0day-ci/archive/20230817/202308171639.9kwRxWZR-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230817/202308171639.9kwRxWZR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308171639.9kwRxWZR-lkp@intel.com/

All errors (new ones prefixed by >>):

   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8544ds has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.tqm8555 has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8555cds has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8572ds has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8560ads has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.tqm8548 has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.tqm8540 has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.tqm8541 has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8548cds_32b has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8541cds has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
--
   powerpc-linux-ld: warning: div64.o: missing .note.GNU-stack section implies executable stack
   powerpc-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   powerpc-linux-ld: warning: arch/powerpc/boot/cuImage.mpc8568mds has a LOAD segment with RWX permissions
   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress'
..


vim +132 arch/powerpc/boot/decompress.c

1b7898ee276b39 Oliver O'Halloran 2016-09-22   97  
1b7898ee276b39 Oliver O'Halloran 2016-09-22   98  /**
1b7898ee276b39 Oliver O'Halloran 2016-09-22   99   * partial_decompress - decompresses part or all of a compressed buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  100   * @inbuf:       input buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  101   * @input_size:  length of the input buffer
930a77c3ad79c3 Zhang Jianhua     2021-05-10  102   * @outbuf:      output buffer
930a77c3ad79c3 Zhang Jianhua     2021-05-10  103   * @output_size: length of the output buffer
1b7898ee276b39 Oliver O'Halloran 2016-09-22  104   * @skip         number of output bytes to ignore
1b7898ee276b39 Oliver O'Halloran 2016-09-22  105   *
1b7898ee276b39 Oliver O'Halloran 2016-09-22  106   * This function takes compressed data from inbuf, decompresses and write it to
1b7898ee276b39 Oliver O'Halloran 2016-09-22  107   * outbuf. Once output_size bytes are written to the output buffer, or the
1b7898ee276b39 Oliver O'Halloran 2016-09-22  108   * stream is exhausted the function will return the number of bytes that were
1b7898ee276b39 Oliver O'Halloran 2016-09-22  109   * decompressed. Otherwise it will return whatever error code the decompressor
1b7898ee276b39 Oliver O'Halloran 2016-09-22  110   * reported (NB: This is specific to each decompressor type).
1b7898ee276b39 Oliver O'Halloran 2016-09-22  111   *
1b7898ee276b39 Oliver O'Halloran 2016-09-22  112   * The skip functionality is mainly there so the program and discover
1b7898ee276b39 Oliver O'Halloran 2016-09-22  113   * the size of the compressed image so that it can ask firmware (if present)
1b7898ee276b39 Oliver O'Halloran 2016-09-22  114   * for an appropriately sized buffer.
1b7898ee276b39 Oliver O'Halloran 2016-09-22  115   */
1b7898ee276b39 Oliver O'Halloran 2016-09-22  116  long partial_decompress(void *inbuf, unsigned long input_size,
1b7898ee276b39 Oliver O'Halloran 2016-09-22  117  	void *outbuf, unsigned long output_size, unsigned long _skip)
1b7898ee276b39 Oliver O'Halloran 2016-09-22  118  {
1b7898ee276b39 Oliver O'Halloran 2016-09-22  119  	int ret;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  120  
1b7898ee276b39 Oliver O'Halloran 2016-09-22  121  	/*
1b7898ee276b39 Oliver O'Halloran 2016-09-22  122  	 * The skipped bytes needs to be included in the size of data we want
1b7898ee276b39 Oliver O'Halloran 2016-09-22  123  	 * to decompress.
1b7898ee276b39 Oliver O'Halloran 2016-09-22  124  	 */
1b7898ee276b39 Oliver O'Halloran 2016-09-22  125  	output_size += _skip;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  126  
1b7898ee276b39 Oliver O'Halloran 2016-09-22  127  	decompressed_bytes = 0;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  128  	output_buffer = outbuf;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  129  	limit = output_size;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  130  	skip = _skip;
1b7898ee276b39 Oliver O'Halloran 2016-09-22  131  
1b7898ee276b39 Oliver O'Halloran 2016-09-22 @132  	ret = __decompress(inbuf, input_size, NULL, flush, outbuf,

:::::: The code at line 132 was first introduced by commit
:::::: 1b7898ee276b39e54d870dc4ef3374f663d0b426 powerpc/boot: Use the pre-boot decompression API

:::::: TO: Oliver O'Halloran <oohall@gmail.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

-- 
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