[PATCH] fbdev: mb862xxfb: Silence possibly unused functions

[PATCH] fbdev: mb862xxfb: Silence possibly unused functions

[Helge Deller]

When CONFIG_PCI=n, the kernel test robot reports that on powerpc some
functions and variables may possibly be unused. Silence those warnings.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202608081537.o23Goj8d-lkp@intel.com/
Signed-off-by: Helge Deller <deller@gmx.de>
---
 drivers/video/fbdev/mb862xx/mb862xxfbdrv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c b/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
index 676c6d3ccc12..99c404dbc832 100644
--- a/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
+++ b/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
@@ -408,7 +408,7 @@ static struct fb_ops mb862xxfb_ops = {
 };
 
 /* initialize fb_info data */
-static int mb862xxfb_init_fbinfo(struct fb_info *fbi)
+static int __maybe_unused mb862xxfb_init_fbinfo(struct fb_info *fbi)
 {
 	struct mb862xxfb_par *par = fbi->par;
 	struct mb862xx_gc_mode *mode = par->gc_mode;
@@ -568,9 +568,9 @@ static ssize_t dispregs_show(struct device *dev,
 	return ptr - buf;
 }
 
-static DEVICE_ATTR_RO(dispregs);
+static DEVICE_ATTR_RO(dispregs) __maybe_unused;
 
-static irqreturn_t mb862xx_intr(int irq, void *dev_id)
+static irqreturn_t __maybe_unused mb862xx_intr(int irq, void *dev_id)
 {
 	struct mb862xxfb_par *par = (struct mb862xxfb_par *) dev_id;
 	unsigned long reg_ist, mask;
-- 
2.55.0

Re: [PATCH] fbdev: mb862xxfb: Silence possibly unused functions

[kernel test robot]

:::::: 
:::::: Manual check reason: "linux-review patch is more than 7 days old, verify it wasn't already superseded"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20260808083648.257464-1-deller@gmx.de>
References: <20260808083648.257464-1-deller@gmx.de>
TO: Helge Deller <deller@gmx.de>
TO: linux-fbdev@vger.kernel.org
TO: dri-devel@lists.freedesktop.org

Hi Helge,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on drm-tip/drm-tip v7.2]
[cannot apply to linus/master next-20260821]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Helge-Deller/fbdev-mb862xxfb-Silence-possibly-unused-functions/20260808-103648
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260808083648.257464-1-deller%40gmx.de
patch subject: [PATCH] fbdev: mb862xxfb: Silence possibly unused functions
:::::: branch date: 30 hours ago
:::::: commit date: 30 hours ago
config: parisc-allyesconfig (https://download.01.org/0day-ci/archive/20260824/202608240747.dZkqSMpL-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260824/202608240747.dZkqSMpL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202608240747.dZkqSMpL-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/compiler_types.h:88,
                    from <command-line>:
>> include/linux/compiler_attributes.h:352:41: error: expected ',' or ';' before '__attribute__'
     352 | #define __maybe_unused                  __attribute__((__unused__))
         |                                         ^~~~~~~~~~~~~
   drivers/video/fbdev/mb862xx/mb862xxfbdrv.c:571:33: note: in expansion of macro '__maybe_unused'
     571 | static DEVICE_ATTR_RO(dispregs) __maybe_unused;
         |                                 ^~~~~~~~~~~~~~


vim +352 include/linux/compiler_attributes.h

fd7eea27a3aed7 Heiko Carstens 2024-02-05  343  
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  344  /*
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  345   *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-unused-function-attribute
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  346   *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-unused-type-attribute
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  347   *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-unused-variable-attribute
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  348   *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-unused-label-attribute
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  349   * clang: https://clang.llvm.org/docs/AttributeReference.html#maybe-unused-unused
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  350   */
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  351  #define __always_unused                 __attribute__((__unused__))
a3f8a30f3f0079 Miguel Ojeda   2018-08-30 @352  #define __maybe_unused                  __attribute__((__unused__))
a3f8a30f3f0079 Miguel Ojeda   2018-08-30  353  

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki