The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 88ac3bbcf73853880a9b2a65c67e6854390741cc # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023061726-possum-unrigged-32af@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 88ac3bbcf73853880a9b2a65c67e6854390741cc Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda ribalda@chromium.org Date: Fri, 19 May 2023 16:47:39 +0200 Subject: [PATCH] riscv/purgatory: remove PGO flags
If profile-guided optimization is enabled, the purgatory ends up with multiple .text sections. This is not supported by kexec and crashes the system.
Link: https://lkml.kernel.org/r/20230321-kexec_clang16-v7-4-b05c520b7296@chromium.... Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory") Signed-off-by: Ricardo Ribalda ribalda@chromium.org Acked-by: Palmer Dabbelt palmer@rivosinc.com Cc: stable@vger.kernel.org Cc: Albert Ou aou@eecs.berkeley.edu Cc: Baoquan He bhe@redhat.com Cc: Borislav Petkov (AMD) bp@alien8.de Cc: Christophe Leroy christophe.leroy@csgroup.eu Cc: Dave Hansen dave.hansen@linux.intel.com Cc: Dave Young dyoung@redhat.com Cc: Eric W. Biederman ebiederm@xmission.com Cc: "H. Peter Anvin" hpa@zytor.com Cc: Ingo Molnar mingo@redhat.com Cc: Michael Ellerman mpe@ellerman.id.au Cc: Nathan Chancellor nathan@kernel.org Cc: Nicholas Piggin npiggin@gmail.com Cc: Nick Desaulniers ndesaulniers@google.com Cc: Palmer Dabbelt palmer@dabbelt.com Cc: Paul Walmsley paul.walmsley@sifive.com Cc: Philipp Rudo prudo@redhat.com Cc: Ross Zwisler zwisler@google.com Cc: Simon Horman horms@kernel.org Cc: Steven Rostedt (Google) rostedt@goodmis.org Cc: Thomas Gleixner tglx@linutronix.de Cc: Tom Rix trix@redhat.com Signed-off-by: Andrew Morton akpm@linux-foundation.org
diff --git a/arch/riscv/purgatory/Makefile b/arch/riscv/purgatory/Makefile index 5730797a6b40..bd2e27f82532 100644 --- a/arch/riscv/purgatory/Makefile +++ b/arch/riscv/purgatory/Makefile @@ -35,6 +35,11 @@ CFLAGS_sha256.o := -D__DISABLE_EXPORTS CFLAGS_string.o := -D__DISABLE_EXPORTS CFLAGS_ctype.o := -D__DISABLE_EXPORTS
+# When profile-guided optimization is enabled, llvm emits two different +# overlapping text sections, which is not supported by kexec. Remove profile +# optimization flags. +KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS)) + # When linking purgatory.ro with -r unresolved symbols are not checked, # also link a purgatory.chk binary without -r to check for unresolved symbols. PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib