quoted

diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h
index f2f8d8aa8e3b..741c4f7573c4 100644
--- a/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/arch/powerpc/include/asm/hw_breakpoint.h

@@ -43,6 +43,8 @@ struct arch_hw_breakpoint {

  #define DABR_MAX_LEN    8
  #define DAWR_MAX_LEN    512
+extern int nr_wp_slots(void);

'extern' keyword is unneeded and irrelevant here. Please remove it. Even checkpatch is unhappy (https://openpower.xyz/job/snowpatch/job/snowpatch-linux-checkpatch/12172//artifact/linux/checkpatch.log)

Sure.

...

quoted

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 110db94cdf3c..6d4b029532e2 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c

@@ -835,6 +835,12 @@ static inline bool hw_brk_match(struct arch_hw_breakpoint *a,

      return true;
  }
+/* Returns total number of data breakpoints available. */
+int nr_wp_slots(void)
+{
+    return HBP_NUM_MAX;
+}
+

This is not worth a global function. At least it should be a static function located in hw_breakpoint.c. But it would be even better to have it as a static inline in asm/hw_breakpoint.h

Makes sense. Will change it.

Thanks.