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[v4,07/16] powerpc/watchpoint: Get watchpoint count dynamically while disabling them

Message ID 20200430043417.30948-8-ravi.bangoria@linux.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/watchpoint: Preparation for more than one watchpoint | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (54dc28ff5e0b3585224d49a31b53e030342ca5c3)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Ravi Bangoria April 30, 2020, 4:34 a.m. UTC 
Instead of disabling only one watchpoint, get num of available
watchpoints dynamically and disable all of them.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Reviewed-by: Michael Neuling <mikey@neuling.org>
---
 arch/powerpc/include/asm/hw_breakpoint.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h
index 1120c7d9db58..d472b2eb757e 100644
--- a/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/arch/powerpc/include/asm/hw_breakpoint.h
@@ -78,14 +78,14 @@  extern void ptrace_triggered(struct perf_event *bp,
 			struct perf_sample_data *data, struct pt_regs *regs);
 static inline void hw_breakpoint_disable(void)
 {
-	struct arch_hw_breakpoint brk;
-
-	brk.address = 0;
-	brk.type = 0;
-	brk.len = 0;
-	brk.hw_len = 0;
-	if (ppc_breakpoint_available())
-		__set_breakpoint(0, &brk);
+	int i;
+	struct arch_hw_breakpoint null_brk = {0};
+
+	if (!ppc_breakpoint_available())
+		return;
+
+	for (i = 0; i < nr_wp_slots(); i++)
+		__set_breakpoint(i, &null_brk);
 }
 extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
 int hw_breakpoint_handler(struct die_args *args);