[openeuler:OLK-5.10 2974/2974] fs/fuse/inode.c:131:21: warning: unused variable 'fc'
tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 0bb9efd4883938dec34f710bce07ec3ecf5a04bd commit: f16d89538c1c2988f355d33d15e4c639b0cf5207 [2974/2974] fuse: add fuse fastpath forget cmd support config: arm64-randconfig-001-20250620 (https://download.01.org/0day-ci/archive/20250620/202506200422.FFs2lebc-lkp@i...) compiler: aarch64-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250620/202506200422.FFs2lebc-lkp@i...) 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/202506200422.FFs2lebc-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/fuse/fuse_i.h:23, from fs/fuse/inode.c:9: include/linux/backing-dev.h:430:49: warning: 'struct cgroup_subsys' declared inside parameter list will not be visible outside of this definition or declaration 430 | static inline void bind_memcg_blkcg_link(struct cgroup_subsys *ss, | ^~~~~~~~~~~~~ fs/fuse/inode.c: In function 'fuse_evict_inode':
fs/fuse/inode.c:131:21: warning: unused variable 'fc' [-Wunused-variable] 131 | struct fuse_conn *fc = get_fuse_conn(inode); | ^~
Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for CPPC_CPUFREQ_SYSFS_INTERFACE Depends on [n]: CPU_FREQ [=y] && (ARM || ARM64 [=y]) && ACPI_CPPC_CPUFREQ [=n] Selected by [m]: - CPU_FREQ_GOV_SEEP [=m] && CPU_FREQ [=y] && (ACPI_CPPC_CPUFREQ [=n] || ARM64 [=y]) vim +/fc +131 fs/fuse/inode.c d8a5ba45457e4a Miklos Szeredi 2005-09-09 8 d8a5ba45457e4a Miklos Szeredi 2005-09-09 @9 #include "fuse_i.h" d8a5ba45457e4a Miklos Szeredi 2005-09-09 10 d8a5ba45457e4a Miklos Szeredi 2005-09-09 11 #include <linux/pagemap.h> d8a5ba45457e4a Miklos Szeredi 2005-09-09 12 #include <linux/slab.h> d8a5ba45457e4a Miklos Szeredi 2005-09-09 13 #include <linux/file.h> d8a5ba45457e4a Miklos Szeredi 2005-09-09 14 #include <linux/seq_file.h> d8a5ba45457e4a Miklos Szeredi 2005-09-09 15 #include <linux/init.h> d8a5ba45457e4a Miklos Szeredi 2005-09-09 16 #include <linux/module.h> 487ea5af6358cb Csaba Henk 2009-08-26 17 #include <linux/moduleparam.h> c30da2e981a703 David Howells 2019-03-25 18 #include <linux/fs_context.h> c30da2e981a703 David Howells 2019-03-25 19 #include <linux/fs_parser.h> d8a5ba45457e4a Miklos Szeredi 2005-09-09 20 #include <linux/statfs.h> 9c8ef5614da226 Miklos Szeredi 2006-06-25 21 #include <linux/random.h> e8edc6e03a5c85 Alexey Dobriyan 2007-05-21 22 #include <linux/sched.h> dbd561d236ff16 Miklos Szeredi 2008-07-25 23 #include <linux/exportfs.h> 60bcc88ad185d5 Seth Forshee 2016-08-29 24 #include <linux/posix_acl.h> 0b6e9ea041e6c9 Seth Forshee 2014-07-02 25 #include <linux/pid_namespace.h> d738472f483478 chenrenhui 2025-05-13 26 #ifdef CONFIG_FUSE_FASTPATH d738472f483478 chenrenhui 2025-05-13 27 #include <linux/fast_ipc.h> d738472f483478 chenrenhui 2025-05-13 28 #endif d8a5ba45457e4a Miklos Szeredi 2005-09-09 29 d8a5ba45457e4a Miklos Szeredi 2005-09-09 30 MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>"); d8a5ba45457e4a Miklos Szeredi 2005-09-09 31 MODULE_DESCRIPTION("Filesystem in Userspace"); d8a5ba45457e4a Miklos Szeredi 2005-09-09 32 MODULE_LICENSE("GPL"); d8a5ba45457e4a Miklos Szeredi 2005-09-09 33 e18b890bb0881b Christoph Lameter 2006-12-06 34 static struct kmem_cache *fuse_inode_cachep; bafa96541b250a Miklos Szeredi 2006-06-25 35 struct list_head fuse_conn_list; bafa96541b250a Miklos Szeredi 2006-06-25 36 DEFINE_MUTEX(fuse_mutex); d8a5ba45457e4a Miklos Szeredi 2005-09-09 37 e4dca7b7aa08b2 Kees Cook 2017-10-17 38 static int set_global_limit(const char *val, const struct kernel_param *kp); 487ea5af6358cb Csaba Henk 2009-08-26 39 79a9d99434b104 Csaba Henk 2009-08-26 40 unsigned max_user_bgreq; 487ea5af6358cb Csaba Henk 2009-08-26 41 module_param_call(max_user_bgreq, set_global_limit, param_get_uint, 487ea5af6358cb Csaba Henk 2009-08-26 42 &max_user_bgreq, 0644); 487ea5af6358cb Csaba Henk 2009-08-26 43 __MODULE_PARM_TYPE(max_user_bgreq, "uint"); 487ea5af6358cb Csaba Henk 2009-08-26 44 MODULE_PARM_DESC(max_user_bgreq, 487ea5af6358cb Csaba Henk 2009-08-26 45 "Global limit for the maximum number of backgrounded requests an " 487ea5af6358cb Csaba Henk 2009-08-26 46 "unprivileged user can set"); 487ea5af6358cb Csaba Henk 2009-08-26 47 79a9d99434b104 Csaba Henk 2009-08-26 48 unsigned max_user_congthresh; 487ea5af6358cb Csaba Henk 2009-08-26 49 module_param_call(max_user_congthresh, set_global_limit, param_get_uint, 487ea5af6358cb Csaba Henk 2009-08-26 50 &max_user_congthresh, 0644); 487ea5af6358cb Csaba Henk 2009-08-26 51 __MODULE_PARM_TYPE(max_user_congthresh, "uint"); 487ea5af6358cb Csaba Henk 2009-08-26 52 MODULE_PARM_DESC(max_user_congthresh, 487ea5af6358cb Csaba Henk 2009-08-26 53 "Global limit for the maximum congestion threshold an " 487ea5af6358cb Csaba Henk 2009-08-26 54 "unprivileged user can set"); 487ea5af6358cb Csaba Henk 2009-08-26 55 d8a5ba45457e4a Miklos Szeredi 2005-09-09 56 #define FUSE_SUPER_MAGIC 0x65735546 d8a5ba45457e4a Miklos Szeredi 2005-09-09 57 d1875dbaa58e48 Miklos Szeredi 2008-02-08 58 #define FUSE_DEFAULT_BLKSIZE 512 d1875dbaa58e48 Miklos Szeredi 2008-02-08 59 7a6d3c8b3049d0 Csaba Henk 2009-07-01 60 /** Maximum number of outstanding background requests */ 7a6d3c8b3049d0 Csaba Henk 2009-07-01 61 #define FUSE_DEFAULT_MAX_BACKGROUND 12 7a6d3c8b3049d0 Csaba Henk 2009-07-01 62 7a6d3c8b3049d0 Csaba Henk 2009-07-01 63 /** Congestion starts at 75% of maximum */ 7a6d3c8b3049d0 Csaba Henk 2009-07-01 64 #define FUSE_DEFAULT_CONGESTION_THRESHOLD (FUSE_DEFAULT_MAX_BACKGROUND * 3 / 4) 7a6d3c8b3049d0 Csaba Henk 2009-07-01 65 c30da2e981a703 David Howells 2019-03-25 66 #ifdef CONFIG_BLOCK c30da2e981a703 David Howells 2019-03-25 67 static struct file_system_type fuseblk_fs_type; c30da2e981a703 David Howells 2019-03-25 68 #endif c30da2e981a703 David Howells 2019-03-25 69 a2daff6803a384 Randy Dunlap 2011-05-31 70 struct fuse_forget_link *fuse_alloc_forget(void) 07e77dca8a1f17 Miklos Szeredi 2010-12-07 71 { dc69e98c241e14 Khazhismel Kumykov 2019-09-17 72 return kzalloc(sizeof(struct fuse_forget_link), GFP_KERNEL_ACCOUNT); 07e77dca8a1f17 Miklos Szeredi 2010-12-07 73 } 07e77dca8a1f17 Miklos Szeredi 2010-12-07 74 d8a5ba45457e4a Miklos Szeredi 2005-09-09 75 static struct inode *fuse_alloc_inode(struct super_block *sb) d8a5ba45457e4a Miklos Szeredi 2005-09-09 76 { d8a5ba45457e4a Miklos Szeredi 2005-09-09 77 struct fuse_inode *fi; d8a5ba45457e4a Miklos Szeredi 2005-09-09 78 9031a69cf9f024 zhangliguang 2019-05-06 79 fi = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL); 9031a69cf9f024 zhangliguang 2019-05-06 80 if (!fi) d8a5ba45457e4a Miklos Szeredi 2005-09-09 81 return NULL; d8a5ba45457e4a Miklos Szeredi 2005-09-09 82 0a0898cf413876 Miklos Szeredi 2006-07-30 83 fi->i_time = 0; 2f1e81965fd0f6 Miklos Szeredi 2018-10-15 84 fi->inval_mask = 0; d8a5ba45457e4a Miklos Szeredi 2005-09-09 85 fi->nodeid = 0; 9e6268db496a25 Miklos Szeredi 2005-09-09 86 fi->nlookup = 0; fbee36b92abc96 John Muir 2007-11-28 87 fi->attr_version = 0; 45c72cd73c788d Pavel Shilovsky 2012-05-10 88 fi->orig_ino = 0; 4582a4ab2a0e72 Feng Shuo 2013-01-15 89 fi->state = 0; 5c672ab3f0ee0f Miklos Szeredi 2016-06-30 90 mutex_init(&fi->mutex); 6ae330cad6ef22 Vivek Goyal 2020-08-19 91 init_rwsem(&fi->i_mmap_sem); f15ecfef058d94 Kirill Tkhai 2018-11-09 92 spin_lock_init(&fi->lock); 07e77dca8a1f17 Miklos Szeredi 2010-12-07 93 fi->forget = fuse_alloc_forget(); c2d0ad00d948de Vivek Goyal 2020-08-19 94 if (!fi->forget) c2d0ad00d948de Vivek Goyal 2020-08-19 95 goto out_free; c2d0ad00d948de Vivek Goyal 2020-08-19 96 c2d0ad00d948de Vivek Goyal 2020-08-19 97 if (IS_ENABLED(CONFIG_FUSE_DAX) && !fuse_dax_inode_alloc(sb, fi)) c2d0ad00d948de Vivek Goyal 2020-08-19 98 goto out_free_forget; d8a5ba45457e4a Miklos Szeredi 2005-09-09 99 9031a69cf9f024 zhangliguang 2019-05-06 100 return &fi->inode; c2d0ad00d948de Vivek Goyal 2020-08-19 101 c2d0ad00d948de Vivek Goyal 2020-08-19 102 out_free_forget: c2d0ad00d948de Vivek Goyal 2020-08-19 103 kfree(fi->forget); c2d0ad00d948de Vivek Goyal 2020-08-19 104 out_free: c2d0ad00d948de Vivek Goyal 2020-08-19 105 kmem_cache_free(fuse_inode_cachep, fi); c2d0ad00d948de Vivek Goyal 2020-08-19 106 return NULL; d8a5ba45457e4a Miklos Szeredi 2005-09-09 107 } d8a5ba45457e4a Miklos Szeredi 2005-09-09 108 9baf28bbfea165 Al Viro 2019-04-15 109 static void fuse_free_inode(struct inode *inode) d8a5ba45457e4a Miklos Szeredi 2005-09-09 110 { e5e5558e923f35 Miklos Szeredi 2005-09-09 111 struct fuse_inode *fi = get_fuse_inode(inode); 9baf28bbfea165 Al Viro 2019-04-15 112 5c672ab3f0ee0f Miklos Szeredi 2016-06-30 113 mutex_destroy(&fi->mutex); 07e77dca8a1f17 Miklos Szeredi 2010-12-07 114 kfree(fi->forget); c2d0ad00d948de Vivek Goyal 2020-08-19 115 #ifdef CONFIG_FUSE_DAX c2d0ad00d948de Vivek Goyal 2020-08-19 116 kfree(fi->dax); c2d0ad00d948de Vivek Goyal 2020-08-19 117 #endif 9baf28bbfea165 Al Viro 2019-04-15 118 kmem_cache_free(fuse_inode_cachep, fi); d8a5ba45457e4a Miklos Szeredi 2005-09-09 119 } d8a5ba45457e4a Miklos Szeredi 2005-09-09 120 b57922d97fd6f7 Al Viro 2010-06-07 121 static void fuse_evict_inode(struct inode *inode) d8a5ba45457e4a Miklos Szeredi 2005-09-09 122 { 9baf28bbfea165 Al Viro 2019-04-15 123 struct fuse_inode *fi = get_fuse_inode(inode); 9baf28bbfea165 Al Viro 2019-04-15 124 f562783e91daf0 Miklos Szeredi 2022-01-14 125 /* Will write inode on close/munmap and in all other dirtiers */ f562783e91daf0 Miklos Szeredi 2022-01-14 126 WARN_ON(inode->i_state & I_DIRTY_INODE); f562783e91daf0 Miklos Szeredi 2022-01-14 127 91b0abe36a7b2b Johannes Weiner 2014-04-03 128 truncate_inode_pages_final(&inode->i_data); dbd5768f87ff6f Jan Kara 2012-05-03 129 clear_inode(inode); 1751e8a6cb935e Linus Torvalds 2017-11-27 130 if (inode->i_sb->s_flags & SB_ACTIVE) { e5e5558e923f35 Miklos Szeredi 2005-09-09 @131 struct fuse_conn *fc = get_fuse_conn(inode); c2d0ad00d948de Vivek Goyal 2020-08-19 132 c2d0ad00d948de Vivek Goyal 2020-08-19 133 if (FUSE_IS_DAX(inode)) c2d0ad00d948de Vivek Goyal 2020-08-19 134 fuse_dax_inode_cleanup(inode); 1866d779d5d2ab Max Reitz 2020-09-09 135 if (fi->nlookup) { f16d89538c1c29 wuyifeng10 2025-05-20 136 #ifdef CONFIG_FUSE_FASTPATH f16d89538c1c29 wuyifeng10 2025-05-20 137 fuse_fast_forget(get_fuse_mount(inode), fi->forget, f16d89538c1c29 wuyifeng10 2025-05-20 138 fi->nodeid, fi->nlookup); f16d89538c1c29 wuyifeng10 2025-05-20 139 #else 1866d779d5d2ab Max Reitz 2020-09-09 140 fuse_queue_forget(fc, fi->forget, fi->nodeid, 1866d779d5d2ab Max Reitz 2020-09-09 141 fi->nlookup); f16d89538c1c29 wuyifeng10 2025-05-20 142 #endif 07e77dca8a1f17 Miklos Szeredi 2010-12-07 143 fi->forget = NULL; e5e5558e923f35 Miklos Szeredi 2005-09-09 144 } 1866d779d5d2ab Max Reitz 2020-09-09 145 } ebbe4b9f88081d Miklos Szeredi 2021-01-18 146 if (S_ISREG(inode->i_mode) && !fuse_is_bad(inode)) { 9baf28bbfea165 Al Viro 2019-04-15 147 WARN_ON(!list_empty(&fi->write_files)); 9baf28bbfea165 Al Viro 2019-04-15 148 WARN_ON(!list_empty(&fi->queued_writes)); 9baf28bbfea165 Al Viro 2019-04-15 149 } d8a5ba45457e4a Miklos Szeredi 2005-09-09 150 } d8a5ba45457e4a Miklos Szeredi 2005-09-09 151 :::::: The code at line 131 was first introduced by commit :::::: e5e5558e923f35839108a12718494ecb73fb782f [PATCH] FUSE - read-only operations :::::: TO: Miklos Szeredi <miklos@szeredi.hu> :::::: CC: Linus Torvalds <torvalds@g5.osdl.org> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
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