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Message-ID: <202309131549.VzC1pNwr-lkp@intel.com>
Date: Wed, 13 Sep 2023 15:14:49 +0800
From: kernel test robot <lkp@...el.com>
To: Tom Rix <trix@...hat.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Christophe Leroy <christophe.leroy@...roup.eu>
Subject: arch/powerpc/platforms/cell/spu_base.c:229: warning: Function
parameter or member 'slbs' not described in '__slb_present'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3669558bdf354cd352be955ef2764cde6a9bf5ec
commit: da5311a4b852eaf2c0feac8b28884a8d8a801dfc powerpc/spufs: remove unneeded if-checks
date: 4 months ago
config: powerpc-ppc64_defconfig (https://download.01.org/0day-ci/archive/20230913/202309131549.VzC1pNwr-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230913/202309131549.VzC1pNwr-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309131549.VzC1pNwr-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> arch/powerpc/platforms/cell/spu_base.c:229: warning: Function parameter or member 'slbs' not described in '__slb_present'
>> arch/powerpc/platforms/cell/spu_base.c:229: warning: Function parameter or member 'nr_slbs' not described in '__slb_present'
>> arch/powerpc/platforms/cell/spu_base.c:229: warning: Function parameter or member 'new_addr' not described in '__slb_present'
>> arch/powerpc/platforms/cell/spu_base.c:229: warning: expecting prototype for Given an array of @nr_slbs SLB entries, @slbs, return non(). Prototype was for __slb_present() instead
>> arch/powerpc/platforms/cell/spu_base.c:241: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Setup the SPU kernel SLBs, in preparation for a context save/restore. We
vim +229 arch/powerpc/platforms/cell/spu_base.c
58bd403c3c79dd Jeremy Kerr 2007-12-05 222
684bd614015188 Jeremy Kerr 2007-12-05 223 /**
684bd614015188 Jeremy Kerr 2007-12-05 224 * Given an array of @nr_slbs SLB entries, @slbs, return non-zero if the
684bd614015188 Jeremy Kerr 2007-12-05 225 * address @new_addr is present.
684bd614015188 Jeremy Kerr 2007-12-05 226 */
73d16a6e0e5199 Ian Munsie 2014-10-08 227 static inline int __slb_present(struct copro_slb *slbs, int nr_slbs,
684bd614015188 Jeremy Kerr 2007-12-05 228 void *new_addr)
684bd614015188 Jeremy Kerr 2007-12-05 @229 {
684bd614015188 Jeremy Kerr 2007-12-05 230 unsigned long ea = (unsigned long)new_addr;
684bd614015188 Jeremy Kerr 2007-12-05 231 int i;
684bd614015188 Jeremy Kerr 2007-12-05 232
684bd614015188 Jeremy Kerr 2007-12-05 233 for (i = 0; i < nr_slbs; i++)
684bd614015188 Jeremy Kerr 2007-12-05 234 if (!((slbs[i].esid ^ ea) & ESID_MASK))
684bd614015188 Jeremy Kerr 2007-12-05 235 return 1;
684bd614015188 Jeremy Kerr 2007-12-05 236
684bd614015188 Jeremy Kerr 2007-12-05 237 return 0;
684bd614015188 Jeremy Kerr 2007-12-05 238 }
684bd614015188 Jeremy Kerr 2007-12-05 239
58bd403c3c79dd Jeremy Kerr 2007-12-05 240 /**
58bd403c3c79dd Jeremy Kerr 2007-12-05 @241 * Setup the SPU kernel SLBs, in preparation for a context save/restore. We
58bd403c3c79dd Jeremy Kerr 2007-12-05 242 * need to map both the context save area, and the save/restore code.
684bd614015188 Jeremy Kerr 2007-12-05 243 *
027dfac694fc27 Michael Ellerman 2016-06-01 244 * Because the lscsa and code may cross segment boundaries, we check to see
684bd614015188 Jeremy Kerr 2007-12-05 245 * if mappings are required for the start and end of each range. We currently
684bd614015188 Jeremy Kerr 2007-12-05 246 * assume that the mappings are smaller that one segment - if not, something
684bd614015188 Jeremy Kerr 2007-12-05 247 * is seriously wrong.
58bd403c3c79dd Jeremy Kerr 2007-12-05 248 */
684bd614015188 Jeremy Kerr 2007-12-05 249 void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa,
684bd614015188 Jeremy Kerr 2007-12-05 250 void *code, int code_size)
58bd403c3c79dd Jeremy Kerr 2007-12-05 251 {
73d16a6e0e5199 Ian Munsie 2014-10-08 252 struct copro_slb slbs[4];
684bd614015188 Jeremy Kerr 2007-12-05 253 int i, nr_slbs = 0;
684bd614015188 Jeremy Kerr 2007-12-05 254 /* start and end addresses of both mappings */
684bd614015188 Jeremy Kerr 2007-12-05 255 void *addrs[] = {
684bd614015188 Jeremy Kerr 2007-12-05 256 lscsa, (void *)lscsa + sizeof(*lscsa) - 1,
684bd614015188 Jeremy Kerr 2007-12-05 257 code, code + code_size - 1
684bd614015188 Jeremy Kerr 2007-12-05 258 };
684bd614015188 Jeremy Kerr 2007-12-05 259
684bd614015188 Jeremy Kerr 2007-12-05 260 /* check the set of addresses, and create a new entry in the slbs array
684bd614015188 Jeremy Kerr 2007-12-05 261 * if there isn't already a SLB for that address */
684bd614015188 Jeremy Kerr 2007-12-05 262 for (i = 0; i < ARRAY_SIZE(addrs); i++) {
684bd614015188 Jeremy Kerr 2007-12-05 263 if (__slb_present(slbs, nr_slbs, addrs[i]))
684bd614015188 Jeremy Kerr 2007-12-05 264 continue;
58bd403c3c79dd Jeremy Kerr 2007-12-05 265
684bd614015188 Jeremy Kerr 2007-12-05 266 __spu_kernel_slb(addrs[i], &slbs[nr_slbs]);
684bd614015188 Jeremy Kerr 2007-12-05 267 nr_slbs++;
684bd614015188 Jeremy Kerr 2007-12-05 268 }
58bd403c3c79dd Jeremy Kerr 2007-12-05 269
c92a1acb675058 Arnd Bergmann 2008-02-28 270 spin_lock_irq(&spu->register_lock);
684bd614015188 Jeremy Kerr 2007-12-05 271 /* Add the set of SLBs */
684bd614015188 Jeremy Kerr 2007-12-05 272 for (i = 0; i < nr_slbs; i++)
684bd614015188 Jeremy Kerr 2007-12-05 273 spu_load_slb(spu, i, &slbs[i]);
c92a1acb675058 Arnd Bergmann 2008-02-28 274 spin_unlock_irq(&spu->register_lock);
58bd403c3c79dd Jeremy Kerr 2007-12-05 275 }
58bd403c3c79dd Jeremy Kerr 2007-12-05 276 EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs);
58bd403c3c79dd Jeremy Kerr 2007-12-05 277
:::::: The code at line 229 was first introduced by commit
:::::: 684bd614015188561197342fd336292e9e2ce196 [POWERPC] cell: handle SPE kernel mappings that cross segment boundaries
:::::: TO: Jeremy Kerr <jk@...abs.org>
:::::: CC: Arnd Bergmann <arnd@...db.de>
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