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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-08-02 21:25:38 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-15 08:30:17 +0300 |
| commit | e12d94f80614475b07d046eb095e6b8c1d9dd38d (patch) | |
| tree | fe5c2b27d143f682a885966b4fda9056d661f3a8 | |
| parent | ed49f7fd6438dcc8c93fa7d1d7d815e47c7115dd (diff) | |
| download | linux-e12d94f80614475b07d046eb095e6b8c1d9dd38d.tar.xz | |
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 $(subst ..) on KBUILD_CFLAGS rather than CFLAGS_REMOVE_xxx]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/xmon/Makefile | 4 |
2 files changed, 7 insertions, 3 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 48836a186882..0db4c45bc561 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -190,7 +190,7 @@ static u32 xive_scan_interrupts(struct xive_cpu *xc, bool just_peek) * This is used to perform the magic loads from an ESB * described in xive.h */ -static u8 xive_poke_esb(struct xive_irq_data *xd, u32 offset) +static notrace u8 xive_poke_esb(struct xive_irq_data *xd, u32 offset) { u64 val; @@ -204,7 +204,7 @@ static u8 xive_poke_esb(struct xive_irq_data *xd, u32 offset) } #ifdef CONFIG_XMON -static void xive_dump_eq(const char *name, struct xive_q *q) +static notrace void xive_dump_eq(const char *name, struct xive_q *q) { u32 i0, i1, idx; @@ -218,7 +218,7 @@ static void xive_dump_eq(const char *name, struct xive_q *q) q->toggle, i0, i1); } -void xmon_xive_do_dump(int cpu) +notrace void xmon_xive_do_dump(int cpu) { struct xive_cpu *xc = per_cpu(xive_cpu, cpu); diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile index 0b2f771593eb..1dd88315cff4 100644 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -5,6 +5,10 @@ subdir-ccflags-$(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 |