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| author |   Philipp Rudo <prudo@linux.ibm.com> | 2018-05-16 14:06:32 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-05-18 07:24:35 +0200 |
| commit | d8de7565735af5a95057c83eedb38e36cfaa04b5 (patch) | |
| tree | 25303d5c72148d89611f75023b362200d1122a3a /arch/s390/purgatory/Makefile | |
| parent | Merge tag 'hwmon-for-linus-v4.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging (diff) | |
| download | linux-dev-d8de7565735af5a95057c83eedb38e36cfaa04b5.tar.xz linux-dev-d8de7565735af5a95057c83eedb38e36cfaa04b5.zip | |
s390/purgatory: Fix endless interrupt loop
New compilers use the floating-point registers as spill registers when
there is high register pressure. In the purgatory however, the afp control
bit is not set. This leads to an exception whenever a floating-point
instruction is used, which again causes an interrupt loop.
Forbid the compiler to use floating-point instructions by adding
-msoft-float to KBUILD_CFLAGS.
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Fixes: 840798a1f529 (s390/kexec_file: Add purgatory)
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/purgatory/Makefile')
| -rw-r--r-- | arch/s390/purgatory/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile index e9525bc1b4a6..1ace023cbdce 100644 --- a/arch/s390/purgatory/Makefile +++ b/arch/s390/purgatory/Makefile @@ -21,7 +21,7 @@ LDFLAGS_purgatory.ro += -z nodefaultlib KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -KBUILD_CFLAGS += -c -MD -Os -m64 +KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float KBUILD_CFLAGS += $(call cc-option,-fno-PIE) $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE |