[davidhildenbrand:folded_pgtable 28/32] arch/x86/platform/olpc/olpc_ofw.c:26:16: warning: variable 'ofw_pde' set but not used

[davidhildenbrand:folded_pgtable 28/32] arch/x86/platform/olpc/olpc_ofw.c:26:16: warning: variable 'ofw_pde' set but not used

[kernel test robot]

tree:   https://github.com/davidhildenbrand/linux folded_pgtable
head:   0551ca68b7552b7d71f1d2882635809a573d6c79
commit: 4d449742015c33fd18a4aebf1ee795675c2b532f [28/32] mm/pgtable: disallow calling folded set_pgd/set_p4d/set_pud
config: i386-randconfig-r131-20260709 (https://download.01.org/0day-ci/archive/20260709/202607092037.bS6aWcUf-lkp@intel.com/config)
compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260709/202607092037.bS6aWcUf-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/oe-kbuild-all/202607092037.bS6aWcUf-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/platform/olpc/olpc_ofw.c:26:16: warning: variable 'ofw_pde' set but not used [-Wunused-but-set-variable]
      26 |         pgd_t *base, *ofw_pde;
         |                       ^
   1 warning generated.


vim +/ofw_pde +26 arch/x86/platform/olpc/olpc_ofw.c

fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  23  
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  24  void __init setup_olpc_ofw_pgd(void)
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  25  {
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18 @26  	pgd_t *base, *ofw_pde;
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  27  
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  28  	if (!olpc_ofw_cif)
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  29  		return;
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  30  
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  31  	/* fetch OFW's PDE */
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  32  	base = early_ioremap(olpc_ofw_pgd, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  33  	if (!base) {
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  34  		printk(KERN_ERR "failed to remap OFW's pgd - disabling OFW!\n");
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  35  		olpc_ofw_cif = NULL;
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  36  		return;
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  37  	}
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  38  	ofw_pde = &base[OLPC_OFW_PDE_NR];
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  39  
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  40  	/* install OFW's PDE permanently into the kernel's pgtable */
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  41  	set_pgd(&swapper_pg_dir[OLPC_OFW_PDE_NR], *ofw_pde);
75a9cac430a1bd arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-23  42  	/* implicit optimization barrier here due to uninline function return */
75a9cac430a1bd arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-23  43  
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  44  	early_iounmap(base, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  45  }
fd699c76552bbf arch/x86/kernel/olpc_ofw.c Andres Salomon 2010-06-18  46  

:::::: The code at line 26 was first introduced by commit
:::::: fd699c76552bbfa66631f019be415a87dbb08237 x86, olpc: Add support for calling into OpenFirmware

:::::: TO: Andres Salomon <dilinger@queued.net>
:::::: CC: H. Peter Anvin <hpa@linux.intel.com>

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https://github.com/intel/lkp-tests/wiki