linux/arch/powerpc
Nathan Chancellor 3ce47d95b7 powerpc: Handle .text.{hot,unlikely}.* in linker script
Commit eff8728fe6 ("vmlinux.lds.h: Add PGO and AutoFDO input
sections") added ".text.unlikely.*" and ".text.hot.*" due to an LLVM
change [1].

After another LLVM change [2], these sections are seen in some PowerPC
builds, where there is a orphan section warning then build failure:

$ make -skj"$(nproc)" \
       ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- LLVM=1 O=out \
       distclean powernv_defconfig zImage.epapr
ld.lld: warning: kernel/built-in.a(panic.o):(.text.unlikely.) is being placed in '.text.unlikely.'
...
ld.lld: warning: address (0xc000000000009314) of section .text is not a multiple of alignment (256)
...
ERROR: start_text address is c000000000009400, should be c000000000008000
ERROR: try to enable LD_HEAD_STUB_CATCH config option
ERROR: see comments in arch/powerpc/tools/head_check.sh
...

Explicitly handle these sections like in the main linker script so
there is no more build failure.

[1]: https://reviews.llvm.org/D79600
[2]: https://reviews.llvm.org/D92493

Fixes: 83a092cf95 ("powerpc: Link warning for orphan sections")
Cc: stable@vger.kernel.org
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://github.com/ClangBuiltLinux/linux/issues/1218
Link: https://lore.kernel.org/r/20210104205952.1399409-1-natechancellor@gmail.com
2021-01-06 21:59:04 +11:00
..
boot powerpc/boot: Fix build of dts/fsl 2020-12-21 22:06:09 +11:00
configs powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
crypto crypto: powerpc/sha256-spe - Fix sparse endianness warning 2020-11-27 17:13:41 +11:00
include local64.h: make <asm/local64.h> mandatory 2020-12-29 15:36:49 -08:00
kernel powerpc: Handle .text.{hot,unlikely}.* in linker script 2021-01-06 21:59:04 +11:00
kexec arch, drivers: replace for_each_membock() with for_each_mem_range() 2020-10-13 18:38:35 -07:00
kvm powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
lib powerpc/sstep: Add testcases for VSX vector paired load/store instructions 2020-12-11 00:09:10 +11:00
math-emu treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mm powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
net bpf, powerpc: Fix misuse of fallthrough in bpf_jit_comp() 2020-09-29 16:39:11 +02:00
oprofile powerpc/oprofile: fix spelling mistake "contex" -> "context" 2020-08-25 01:31:33 +10:00
perf powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
platforms dma-mapping updates for 5.11: 2020-12-22 13:19:43 -08:00
purgatory powerpc/kexec_file: Enable early kernel OPAL calls 2020-07-29 23:47:55 +10:00
sysdev powerpc/xive: Improve error reporting of OPAL calls 2020-12-11 09:53:11 +11:00
tools powerpc/tools: Remove 90 line limit in checkpatch script 2020-09-08 22:57:11 +10:00
xmon powerpc/xmon: Change printk() to pr_cont() 2020-12-04 21:56:30 +11:00
Kbuild powerpc/kexec: Move kexec files into a dedicated subdir. 2019-11-21 15:41:34 +11:00
Kconfig dma-mapping updates for 5.11: 2020-12-22 13:19:43 -08:00
Kconfig.debug powerpc: Remove Xilinx PPC405/PPC440 support 2020-05-28 23:24:34 +10:00
Makefile powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
Makefile.postlink powerpc: unrel_branch_check.sh: use nm to find symbol value 2020-09-02 11:00:22 +10:00