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3287ebd7fd
linux/arch/powerpc
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Ojaswin Mujoo 3287ebd7fd powerpc/boot: Fix incorrect version calculation issue in ld_version 
The ld_version() function computes the wrong version value for certain
ld versions such as the following:

  $ ld --version
  GNU ld (GNU Binutils; SUSE Linux Enterprise 15)
  2.37.20211103-150100.7.37

For input 2.37.20211103, the value computed is 202348030000 which is
higher than the value for a later version like 2.39.0, which is
23900000.

This issue was highlighted because with the above ld version, the
powerpc kernel build started failing with ld error: "unrecognized option
--no-warn-rwx-segments". This was caused due to the recent commit
579aee9fc5 ("powerpc: suppress some linker warnings in recent linker
versions") which added the --no-warn-rwx-segments linker flag if the ld
version is greater than 2.39.

Due to the bug in ld_version(), ld version 2.37.20111103 is wrongly
calculated to be greater than 2.39 and the unsupported flag is added.

To fix it, if version is of the form x.y.z and length(z) == 8, then most
probably it is a date [yyyymmdd] commonly used for release snapshots and
not an actual new version. Hence, ignore the date part replacing it with
0.

Fixes: 579aee9fc5 ("powerpc: suppress some linker warnings in recent linker versions")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
[mpe: Tweak change log wording/formatting, add Fixes tag]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230104202437.90039-1-ojaswin@linux.ibm.com
2023-01-11 16:28:43 +11:00
..
boot powerpc/boot: Fix incorrect version calculation issue in ld_version 2023-01-11 16:28:43 +11:00
configs USB/Thunderbolt driver changes for 6.2-rc1 2022-12-16 03:22:53 -08:00
crypto treewide: use get_random_u32_below() instead of deprecated function 2022-11-18 02:15:15 +01:00
include powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
kernel powerpc/vmlinux.lds: Don't discard .comment 2023-01-06 00:25:12 +11:00
kexec powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
kvm powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
lib powerpc/code-patching: Fix oops with DEBUG_VM enabled 2022-12-16 23:59:43 +11:00
math-emu powerpc/math-emu: Inhibit W=1 warnings 2022-09-08 11:11:18 +10:00
mm powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
net powerpc/bpf/32: Fix Oops on tail call tests 2022-11-24 23:05:10 +11:00
perf powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
platforms powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
purgatory powerpc/purgatory: Omit use of bin2c 2022-07-27 21:36:03 +10:00
sysdev powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
tools powerpc/64: Add UADDR64 relocation support 2022-03-09 21:47:53 +11:00
xmon powerpc: Rename STACK_FRAME_MARKER and derive it from frame offset 2022-12-02 17:54:08 +11:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig Merge branch 'topic/objtool' into next 2022-12-08 23:57:47 +11:00
Kconfig.debug powerpc: Add support for early debugging via Serial 16550 console 2022-09-28 19:22:09 +10:00
Makefile Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Makefile.postlink