In file included from /home/sfr/next/next/tools/include/linux/list.h:5:0, from arch/../util/map.h:6, from arch/../util/event.h:8, from arch/../util/debug.h:7, from arch/common.c:4: include/linux/list.h: In function 'list_force_poison': include/linux/list.h:123:56: error: unused parameter 'entry' [-Werror=unused-parameter] static inline void list_force_poison(struct list_head *entry) perf does not like the empty definition of list_force_poison. For simplicity just switch to list_del in the non-debug case. Fixes "mm, dax, pmem: introduce {get|put}_dev_pagemap() for dax-gup" in -next. Reported-by: Stephen Rothwell <sfr(a)canb.auug.org.au&gt; Signed-off-by: Dan Williams <dan.j.williams(a)intel.com&gt; --- include/linux/list.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/include/linux/list.h b/include/linux/list.h index d870ba3315f8..ebf5f358e8c3 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -120,9 +120,8 @@ extern void list_del(struct list_head *entry); */ extern void list_force_poison(struct list_head *entry); #else -static inline void list_force_poison(struct list_head *entry) -{ -} +/* fallback to the less strict LIST_POISON* definitions */ +#define list_force_poison list_del #endif /**