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authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2017-08-02 23:55:38 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2017-08-15 15:30:17 +1000
commite12d94f80614475b07d046eb095e6b8c1d9dd38d (patch)
treefe5c2b27d143f682a885966b4fda9056d661f3a8 /arch/powerpc/xmon/Makefile
parented49f7fd6438dcc8c93fa7d1d7d815e47c7115dd (diff)
downloadlinux-e12d94f80614475b07d046eb095e6b8c1d9dd38d.tar.bz2
powerpc/xmon: Exclude all of xmon from ftrace
Exclude core xmon files from ftrace (along with an xmon xive helper outside of xmon/) to minimize impact of ftrace while within xmon. Before: /sys/kernel/debug/tracing# grep -ci xmon available_filter_functions 26 After: /sys/kernel/debug/tracing# grep -ci xmon available_filter_functions 0 Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> [mpe: Use $(subst ..) on KBUILD_CFLAGS rather than CFLAGS_REMOVE_xxx] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/xmon/Makefile')
-rw-r--r--arch/powerpc/xmon/Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile
index 0b2f771593eb..1dd88315cff4 100644
--- a/arch/powerpc/xmon/Makefile
+++ b/arch/powerpc/xmon/Makefile
@@ -5,6 +5,10 @@ subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
GCOV_PROFILE := n
UBSAN_SANITIZE := n
+# Disable ftrace for the entire directory
+ORIG_CFLAGS := $(KBUILD_CFLAGS)
+KBUILD_CFLAGS = $(subst -mno-sched-epilog,,$(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS)))
+
ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC)
obj-y += xmon.o nonstdio.o spr_access.o