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Christophe Leroy 7e754aa0da crypto: powerpc: Mark ghashp8-ppc.o as an OBJECT_FILES_NON_STANDARD 
[ Upstream commit 1e4d73d06c ]

The following build warning has been reported:

  arch/powerpc/crypto/ghashp8-ppc.o: warning: objtool: .text+0x22c: unannotated intra-function call

This happens due to commit bb7f054f4d ("objtool/powerpc: Add support
for decoding all types of uncond branches")

Disassembly of arch/powerpc/crypto/ghashp8-ppc.o shows:

 arch/powerpc/crypto/ghashp8-ppc.o:     file format elf64-powerpcle

 Disassembly of section .text:

 0000000000000140 <gcm_ghash_p8>:
   140:    f8 ff 00 3c     lis     r0,-8
 ...
   20c:    20 00 80 4e     blr
   210:    00 00 00 00     .long 0x0
   214:    00 0c 14 00     .long 0x140c00
   218:    00 00 04 00     .long 0x40000
   21c:    00 00 00 00     .long 0x0
   220:    47 48 41 53     rlwimi. r1,r26,9,1,3
   224:    48 20 66 6f     xoris   r6,r27,8264
   228:    72 20 50 6f     xoris   r16,r26,8306
   22c:    77 65 72 49     bla     1726574 <gcm_ghash_p8+0x1726434>      <==
 ...

It corresponds to the following code in ghashp8-ppc.o :

 _GLOBAL(gcm_ghash_p8)
    lis    0,0xfff8
 ...
    blr
 .long    0
 .byte    0,12,0x14,0,0,0,4,0
 .long    0
 .size    gcm_ghash_p8,.-gcm_ghash_p8

 .byte 71,72,65,83,72,32,102,111,114,32,80,111,119,101,114,73,83,65,32,50,46,48,55,44,32,67,82,89,80,84,79,71,65,77,83,32,98,121,32,60,97,112,112,114,111,64,111,112,101,110,115,115,108,46,111,114,103,62,0
 .align    2
 .align    2

In fact this is raw data that is after the function end and that is
not text so shouldn't be disassembled as text. But ghashp8-ppc.S is
generated by a perl script and should have been marked as
OBJECT_FILES_NON_STANDARD.

Now that 'bla' is understood as a call instruction, that raw data
is mis-interpreted as an infra-function call.

Mark ghashp8-ppc.o as a OBJECT_FILES_NON_STANDARD to avoid this
warning.

Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Closes: https://lore.kernel.org/all/8c4c3fc2-2bd7-4148-af68-2f504d6119e0@linux.ibm.com
Fixes: 109303336a ("crypto: vmx - Move to arch/powerpc/crypto")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-By: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Sathvika Vasireddy <sv@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/7aa7eb73fe6bc95ac210510e22394ca0ae227b69.1741128786.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-04-10 14:39:16 +02:00
arch crypto: powerpc: Mark ghashp8-ppc.o as an OBJECT_FILES_NON_STANDARD 2025-04-10 14:39:16 +02:00
block block: fix 'kmem_cache of name 'bio-108' already exists' 2025-03-22 12:54:21 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: api - Fix boot-up self-test race 2025-02-08 09:57:28 +01:00
Documentation dt-bindings: vendor-prefixes: add GOcontroll 2025-04-10 14:39:13 +02:00
drivers drm/msm/a6xx: Fix a6xx indexed-regs in devcoreduump 2025-04-10 14:39:15 +02:00
fs bcachefs: bch2_ioctl_subvolume_destroy() fixes 2025-04-07 10:08:37 +02:00
include drm/dp_mst: Fix drm RAD print 2025-04-10 14:39:13 +02:00
init rust: Disallow BTF generation with Rust + LTO 2025-03-22 12:54:23 -07:00
io_uring io_uring/net: fix sendzc double notif flush 2025-03-28 22:03:32 +01:00
ipc ipc: fix memleak if msg_init_ns failed in create_ipc_ns 2024-12-05 14:03:02 +01:00
kernel perf/ring_buffer: Allow the EPOLLRDNORM flag for poll 2025-04-10 14:39:12 +02:00
lib kunit/stackinit: Use fill byte different from Clang i386 pattern 2025-04-10 14:39:11 +02:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm lockdep/mm: Fix might_fault() lockdep check of current->mm->mmap_lock 2025-04-10 14:39:11 +02:00
net netfilter: socket: Lookup orig tuple for IPv6 SNAT 2025-04-07 10:08:35 +02:00
rust rust: init: add missing newline to pr_info! calls 2025-03-22 12:54:26 -07:00
samples rust: treewide: switch to the kernel Vec type 2025-03-13 13:01:46 +01:00
scripts selinux: Chain up tool resolving errors in install_policy.sh 2025-04-10 14:39:11 +02:00
security smack: ipv4/ipv6: tcp/dccp/sctp: fix incorrect child socket label 2025-04-10 14:39:10 +02:00
sound ALSA: timer: Don't take register_mutex with copy_from/to_user() 2025-04-10 14:39:13 +02:00
tools x86/traps: Make exc_double_fault() consistently noreturn 2025-04-10 14:39:12 +02:00
usr kbuild: hdrcheck: fix cross build with clang 2025-03-13 13:02:18 +01:00
virt KVM: x86: switch hugepage recovery thread to vhost_task 2024-12-05 14:02:43 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: enable Clippy's check-private-items 2025-03-13 13:01:42 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add entry for the Rust alloc module 2025-03-13 13:01:47 +01:00
Makefile Linux 6.12.22 2025-04-07 10:08:37 +02:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.