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kmod: remove redundant -mcmodel=large on ppc64le 

In PR #1205, Kamalesh reports:

  ... I see that the -mcmodel=large flag is being passed twice with
  KBUILD_CFLAGS_MODULE set:

  gcc -Wp,-MMD,/root/.kpatch/tmp/patch/.livepatch-meminfo.mod.o.d ............ -mcmodel=medium .... -I/root/kpatch/kmod/patch -mcmodel=large -fplugin=/root/kpatch/kpatch-build/gcc-plugins/ppc64le-plugin.so ... -DMODULE -mno-save-toc-indirect -mcmodel=large -mcmodel=large -DKBUILD_BASENAME='"livepatch_meminfo.mod"' -DKBUILD_MODNAME='"livepatch_meminfo"' -D__KBUILD_MODNAME=kmod_livepatch_meminfo -c -o /root/.kpatch/tmp/patch/livepatch-meminfo.mod.o /root/.kpatch/tmp/patch/livepatch-meminfo.mod.c.

  I loaded the module built without the KBUILD_CFLAGS_MODULE +=
  -mcmodel=large flag and seems to okay. I guess, we can remove the arch
  specific flag from the Makefile.

Suggested-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
This commit is contained in:
Joe Lawrence 2021-08-09 16:55:19 -04:00
parent 624e5e3b82
commit a02668a0f7
1 changed files with 0 additions and 8 deletions
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8
kmod/patch/Makefile
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@ -2,14 +2,6 @@ KPATCH_BUILD ?= /lib/modules/$(shell uname -r)/build
KPATCH_MAKE = $(MAKE) -C $(KPATCH_BUILD) M=$(PWD) CFLAGS_MODULE='$(CFLAGS_MODULE)'
LDFLAGS += $(KPATCH_LDFLAGS)
# ppc64le kernel modules are expected to compile with the
# -mcmodel=large flag. This enables 64-bit relocations
# instead of a 32-bit offset from the TOC pointer.
PROCESSOR = $(shell uname -m)
ifeq ($(PROCESSOR), ppc64le)
CFLAGS_MODULE += -mcmodel=large
endif
obj-m += $(KPATCH_NAME).o
ldflags-y += -T $(src)/kpatch.lds
targets += kpatch.lds