As reported by the kernel test robot, the following error occurs:

arch/parisc/kernel/pdt.c:65:6: warning: no previous prototype for 'arch_report_meminfo' [-Wmissing-prototypes]
      65 | void arch_report_meminfo(struct seq_file *m)
         |      ^~~~~~~~~~~~~~~~~~~

arch_report_meminfo() is declared in include/linux/proc_fs.h and only
defined when CONFIG_PROC_FS is enabled. Wrap its definition in #ifdef
CONFIG_PROC_FS to fix the -Wmissing-prototypes warning.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502082315.IPaHaTyM-lkp@intel.com/
Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com>
---
 arch/parisc/kernel/pdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/parisc/kernel/pdt.c b/arch/parisc/kernel/pdt.c
index 0f9b3b5914cf..b70b67adb855 100644
--- a/arch/parisc/kernel/pdt.c
+++ b/arch/parisc/kernel/pdt.c
@@ -63,6 +63,7 @@ static unsigned long pdt_entry[MAX_PDT_ENTRIES] __page_aligned_bss;
 #define PDT_ADDR_PERM_ERR	(pdt_type != PDT_PDC ? 2UL : 0UL)
 #define PDT_ADDR_SINGLE_ERR	1UL
 
+#ifdef CONFIG_PROC_FS
 /* report PDT entries via /proc/meminfo */
 void arch_report_meminfo(struct seq_file *m)
 {
@@ -74,6 +75,7 @@ void arch_report_meminfo(struct seq_file *m)
 	seq_printf(m, "PDT_cur_entries: %7lu\n",
 			pdt_status.pdt_entries);
 }
+#endif
 
 static int get_info_pat_new(void)
 {
-- 
2.43.0

On 2/8/25 18:43, Yu-Chun Lin wrote:
> As reported by the kernel test robot, the following error occurs:
>
> arch/parisc/kernel/pdt.c:65:6: warning: no previous prototype for 'arch_report_meminfo' [-Wmissing-prototypes]
>        65 | void arch_report_meminfo(struct seq_file *m)
>           |      ^~~~~~~~~~~~~~~~~~~
>
> arch_report_meminfo() is declared in include/linux/proc_fs.h and only
> defined when CONFIG_PROC_FS is enabled. Wrap its definition in #ifdef
> CONFIG_PROC_FS to fix the -Wmissing-prototypes warning.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202502082315.IPaHaTyM-lkp@intel.com/
> Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com>

applied.

Thanks!
Helge