diff options
| author | Ricardo Ribalda <[email protected]> | 2023-05-19 16:47:37 +0200 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-06-12 11:31:50 -0700 |
| commit | 97b6b9cbba40a21c1d9a344d5c1991f8cfbf136e (patch) | |
| tree | 433863f333f936634684dddd76dbf513bab93874 | |
| parent | 8652d44f466ad5772e7d1756e9457046189b0dfc (diff) | |
x86/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/[email protected]
Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory")
Signed-off-by: Ricardo Ribalda <[email protected]>
Cc: <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Borislav Petkov (AMD) <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Philipp Rudo <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Simon Horman <[email protected]>
Cc: Steven Rostedt (Google) <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tom Rix <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | arch/x86/purgatory/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 82fec66d46d2..42abd6af1198 100644 --- a/arch/x86/purgatory/Makefile +++ b/arch/x86/purgatory/Makefile @@ -14,6 +14,11 @@ $(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE CFLAGS_sha256.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 |