[tip:for-vfs-merged 2/2] arch/x86//kernel/cpu/intel_rdt_rdtgroup.c:1263:3: error: 'dentry' undeclared

From: kbuild test robot
Date: Sat Jun 23 2018 - 08:25:21 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git for-vfs-merged
head: 3211a734d6978435fe71c38bd6987fa1998bae83
commit: 3211a734d6978435fe71c38bd6987fa1998bae83 [2/2] Merge branch 'for-vfs' into for-vfs-merged
config: i386-randconfig-x014-201824 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
git checkout 3211a734d6978435fe71c38bd6987fa1998bae83
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

arch/x86//kernel/cpu/intel_rdt_rdtgroup.c: In function 'rdt_get_tree':
>> arch/x86//kernel/cpu/intel_rdt_rdtgroup.c:1263:3: error: 'dentry' undeclared (first use in this function)
dentry = ERR_PTR(ret);
^~~~~~
arch/x86//kernel/cpu/intel_rdt_rdtgroup.c:1263:3: note: each undeclared identifier is reported only once for each function it appears in

vim +/dentry +1263 arch/x86//kernel/cpu/intel_rdt_rdtgroup.c

ba3e9328 Thomas Gleixner 2018-06-23 1217
58e4e439 David Howells 2018-06-15 1218 static int rdt_get_tree(struct fs_context *fc)
5ff193fb Fenghua Yu 2016-10-28 1219 {
58e4e439 David Howells 2018-06-15 1220 struct rdt_fs_context *ctx = rdt_fc2context(fc);
e3302683 Vikas Shivappa 2017-07-25 1221 struct rdt_domain *dom;
e3302683 Vikas Shivappa 2017-07-25 1222 struct rdt_resource *r;
5ff193fb Fenghua Yu 2016-10-28 1223 int ret;
5ff193fb Fenghua Yu 2016-10-28 1224
87943db7 Reinette Chatre 2017-10-20 1225 cpus_read_lock();
5ff193fb Fenghua Yu 2016-10-28 1226 mutex_lock(&rdtgroup_mutex);
5ff193fb Fenghua Yu 2016-10-28 1227 /*
5ff193fb Fenghua Yu 2016-10-28 1228 * resctrl file system can only be mounted once.
5ff193fb Fenghua Yu 2016-10-28 1229 */
4af4a88e Vikas Shivappa 2017-07-25 1230 if (static_branch_unlikely(&rdt_enable_key)) {
58e4e439 David Howells 2018-06-15 1231 ret = -EBUSY;
5ff193fb Fenghua Yu 2016-10-28 1232 goto out;
5ff193fb Fenghua Yu 2016-10-28 1233 }
5ff193fb Fenghua Yu 2016-10-28 1234
ba3e9328 Thomas Gleixner 2018-06-23 1235 ret = rdt_enable_ctx(ctx);
58e4e439 David Howells 2018-06-15 1236 if (ret < 0)
5ff193fb Fenghua Yu 2016-10-28 1237 goto out_cdp;
4e978d06 Fenghua Yu 2016-10-28 1238
58e4e439 David Howells 2018-06-15 1239 closid_init();
58e4e439 David Howells 2018-06-15 1240
58e4e439 David Howells 2018-06-15 1241 ret = rdtgroup_create_info_dir(rdtgroup_default.kn);
58e4e439 David Howells 2018-06-15 1242 if (ret < 0)
58e4e439 David Howells 2018-06-15 1243 goto out_mba;
58e4e439 David Howells 2018-06-15 1244
4af4a88e Vikas Shivappa 2017-07-25 1245 if (rdt_mon_capable) {
4af4a88e Vikas Shivappa 2017-07-25 1246 ret = mongroup_create_dir(rdtgroup_default.kn,
4af4a88e Vikas Shivappa 2017-07-25 1247 NULL, "mon_groups",
4af4a88e Vikas Shivappa 2017-07-25 1248 &kn_mongrp);
58e4e439 David Howells 2018-06-15 1249 if (ret < 0)
4af4a88e Vikas Shivappa 2017-07-25 1250 goto out_info;
4af4a88e Vikas Shivappa 2017-07-25 1251 kernfs_get(kn_mongrp);
4af4a88e Vikas Shivappa 2017-07-25 1252
4af4a88e Vikas Shivappa 2017-07-25 1253 ret = mkdir_mondata_all(rdtgroup_default.kn,
4af4a88e Vikas Shivappa 2017-07-25 1254 &rdtgroup_default, &kn_mondata);
58e4e439 David Howells 2018-06-15 1255 if (ret < 0)
4af4a88e Vikas Shivappa 2017-07-25 1256 goto out_mongrp;
4af4a88e Vikas Shivappa 2017-07-25 1257 kernfs_get(kn_mondata);
4af4a88e Vikas Shivappa 2017-07-25 1258 rdtgroup_default.mon.mon_data_kn = kn_mondata;
4af4a88e Vikas Shivappa 2017-07-25 1259 }
4af4a88e Vikas Shivappa 2017-07-25 1260
32206ab3 Reinette Chatre 2018-06-22 1261 ret = rdt_pseudo_lock_init();
32206ab3 Reinette Chatre 2018-06-22 1262 if (ret) {
32206ab3 Reinette Chatre 2018-06-22 @1263 dentry = ERR_PTR(ret);
32206ab3 Reinette Chatre 2018-06-22 1264 goto out_mondata;
32206ab3 Reinette Chatre 2018-06-22 1265 }
32206ab3 Reinette Chatre 2018-06-22 1266
58e4e439 David Howells 2018-06-15 1267 ret = kernfs_get_tree(fc);
58e4e439 David Howells 2018-06-15 1268 if (ret < 0)
32206ab3 Reinette Chatre 2018-06-22 1269 goto out_psl;
5ff193fb Fenghua Yu 2016-10-28 1270
4af4a88e Vikas Shivappa 2017-07-25 1271 if (rdt_alloc_capable)
87943db7 Reinette Chatre 2017-10-20 1272 static_branch_enable_cpuslocked(&rdt_alloc_enable_key);
4af4a88e Vikas Shivappa 2017-07-25 1273 if (rdt_mon_capable)
87943db7 Reinette Chatre 2017-10-20 1274 static_branch_enable_cpuslocked(&rdt_mon_enable_key);
4af4a88e Vikas Shivappa 2017-07-25 1275
4af4a88e Vikas Shivappa 2017-07-25 1276 if (rdt_alloc_capable || rdt_mon_capable)
87943db7 Reinette Chatre 2017-10-20 1277 static_branch_enable_cpuslocked(&rdt_enable_key);
e3302683 Vikas Shivappa 2017-07-25 1278
e3302683 Vikas Shivappa 2017-07-25 1279 if (is_mbm_enabled()) {
e3302683 Vikas Shivappa 2017-07-25 1280 r = &rdt_resources_all[RDT_RESOURCE_L3];
e3302683 Vikas Shivappa 2017-07-25 1281 list_for_each_entry(dom, &r->domains, list)
bbc4615e Vikas Shivappa 2017-08-15 1282 mbm_setup_overflow_handler(dom, MBM_OVERFLOW_INTERVAL);
e3302683 Vikas Shivappa 2017-07-25 1283 }
e3302683 Vikas Shivappa 2017-07-25 1284
5ff193fb Fenghua Yu 2016-10-28 1285 goto out;
5ff193fb Fenghua Yu 2016-10-28 1286
32206ab3 Reinette Chatre 2018-06-22 1287 out_psl:
32206ab3 Reinette Chatre 2018-06-22 1288 rdt_pseudo_lock_release();
4af4a88e Vikas Shivappa 2017-07-25 1289 out_mondata:
4af4a88e Vikas Shivappa 2017-07-25 1290 if (rdt_mon_capable)
4af4a88e Vikas Shivappa 2017-07-25 1291 kernfs_remove(kn_mondata);
4af4a88e Vikas Shivappa 2017-07-25 1292 out_mongrp:
4af4a88e Vikas Shivappa 2017-07-25 1293 if (rdt_mon_capable)
4af4a88e Vikas Shivappa 2017-07-25 1294 kernfs_remove(kn_mongrp);
4af4a88e Vikas Shivappa 2017-07-25 1295 out_info:
79298acc Vikas Shivappa 2017-06-26 1296 kernfs_remove(kn_info);
58e4e439 David Howells 2018-06-15 1297 out_mba:
ba3e9328 Thomas Gleixner 2018-06-23 1298 if (ctx->enable_mba_mbps)
58e4e439 David Howells 2018-06-15 1299 set_mba_sc(false);
5ff193fb Fenghua Yu 2016-10-28 1300 out_cdp:
99adde9b Fenghua Yu 2017-12-20 1301 cdp_disable_all();
5ff193fb Fenghua Yu 2016-10-28 1302 out:
9b3a7fd0 Tony Luck 2017-09-25 1303 rdt_last_cmd_clear();
5ff193fb Fenghua Yu 2016-10-28 1304 mutex_unlock(&rdtgroup_mutex);
87943db7 Reinette Chatre 2017-10-20 1305 cpus_read_unlock();
58e4e439 David Howells 2018-06-15 1306 return ret;
58e4e439 David Howells 2018-06-15 1307 }
58e4e439 David Howells 2018-06-15 1308

:::::: The code at line 1263 was first introduced by commit
:::::: 32206ab36553be8714d9253ce33f4085681d369c x86/intel_rdt: Provide pseudo-locking hooks within rdt_mount

:::::: TO: Reinette Chatre <reinette.chatre@xxxxxxxxx>
:::::: CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

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