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Commit e12d94f8 authored by Naveen N. Rao's avatar Naveen N. Rao Committed by Michael Ellerman
Browse files

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: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
[mpe: Use $(subst ..) on KBUILD_CFLAGS rather than CFLAGS_REMOVE_xxx]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent ed49f7fd

arch/powerpc/sysdev/xive/common.c

+3 −3
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/xmon/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -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