From: Christophe Leroy <christophe.leroy@csgroup.eu> stable inclusion from stable-v5.10.96 commit b4c9b6afa3a737b5d02828d1f7183ebde282907c bugzilla: https://gitee.com/openeuler/kernel/issues/I55NWB Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit bba496656a73fc1d1330b49c7f82843836e9feb1 upstream. Boot fails with GCC latent entropy plugin enabled. This is due to early boot functions trying to access 'latent_entropy' global data while the kernel is not relocated at its final destination yet. As there is no way to tell GCC to use PTRRELOC() to access it, disable latent entropy plugin in early_32.o and feature-fixups.o and code-patching.o Fixes: 38addce8b600 ("gcc-plugins: Add latent_entropy plugin") Cc: stable@vger.kernel.org # v4.9+ Reported-by: Erhard Furtner <erhard_f@mailbox.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://bugzilla.kernel.org/show_bug.cgi?id=215217 Link: https://lore.kernel.org/r/2bac55483b8daf5b1caa163a45fa5f9cdbe18be4.164017842... Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yu Liao <liaoyu15@huawei.com> Reviewed-by: Wei Li <liwei391@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- arch/powerpc/kernel/Makefile | 1 + arch/powerpc/lib/Makefile | 3 +++ 2 files changed, 4 insertions(+) diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index cbe9dbfaf005..4b6720e81632 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -11,6 +11,7 @@ CFLAGS_prom_init.o += -fPIC CFLAGS_btext.o += -fPIC endif +CFLAGS_early_32.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) CFLAGS_cputable.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) CFLAGS_prom_init.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) CFLAGS_btext.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index 58991233381e..0697a0e014ae 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -19,6 +19,9 @@ CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING endif +CFLAGS_code-patching.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) +CFLAGS_feature-fixups.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) + obj-y += alloc.o code-patching.o feature-fixups.o pmem.o inst.o test_code-patching.o ifndef CONFIG_KASAN -- 2.20.1