diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2025-12-19 15:09:09 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2025-12-19 15:09:09 +0000 |
| commit | f4ea8e05f2a857d5447c25f7daf00807d38b307d (patch) | |
| tree | 962412bf671e418ca82ad5eaaa675ec369ddbafb /arch/powerpc/lib/code-patching.c | |
| parent | 98a97bf41528ef738b06eb07ec2b2eb1cfde6ce6 (diff) | |
lkdtm/bugs: Do not confuse the clang/objtool with busy wait loop
Since commit eb972eab0794 ("lkdtm/bugs: Add cases for BUG and PANIC
occurring in hardirq context"), building with clang for x86_64 results
in the following warnings:
vmlinux.o: warning: objtool: lkdtm_PANIC_IN_HARDIRQ(): unexpected end of section .text.lkdtm_PANIC_IN_HARDIRQ
vmlinux.o: warning: objtool: lkdtm_BUG_IN_HARDIRQ(): unexpected end of section .text.lkdtm_BUG_IN_HARDIRQ
caused by busy "while (wait_for_...);" loops. Add READ_ONCE() and
cpu_relax() to better indicate the intention and avoid any unwanted
compiler optimisations.
Fixes: eb972eab0794 ("lkdtm/bugs: Add cases for BUG and PANIC occurring in hardirq context")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512190111.jxFSqxUH-lkp@intel.com/
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/powerpc/lib/code-patching.c')
0 files changed, 0 insertions, 0 deletions