CC: [email protected] CC: [email protected] CC: [email protected] TO: Alexander Lobakin <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3498e7f2bb415e447354a3debef6738d9655768c commit: fec6e49b63989657bc4076dad99fa51d5ece34da skbuff: remove __kfree_skb_flush() date: 10 months ago :::::: branch date: 7 hours ago :::::: commit date: 10 months ago config: riscv-randconfig-c006-20211124 (https://download.01.org/0day-ci/archive/20211128/[email protected]/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fec6e49b63989657bc4076dad99fa51d5ece34da git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout fec6e49b63989657bc4076dad99fa51d5ece34da # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) ^ include/linux/if_vlan.h:77:47: note: expanded from macro 'skb_vlan_tag_present' #define skb_vlan_tag_present(__skb) ((__skb)->vlan_present) ^ net/core/dev.c:5885:3: note: '?' condition is false if (skb_vlan_tag_present(p)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ net/core/dev.c:5885:3: note: Taking false branch if (skb_vlan_tag_present(p)) ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ net/core/dev.c:5887:12: note: Calling 'skb_metadata_dst_cmp' diffs |= skb_metadata_dst_cmp(p, skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/net/dst_metadata.h:66:6: note: Assuming the condition is false if (!(skb_a->_skb_refdst | skb_b->_skb_refdst)) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/net/dst_metadata.h:66:2: note: '?' condition is false if (!(skb_a->_skb_refdst | skb_b->_skb_refdst)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/net/dst_metadata.h:66:2: note: '?' condition is false if (!(skb_a->_skb_refdst | skb_b->_skb_refdst)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ include/net/dst_metadata.h:66:2: note: Taking false branch if (!(skb_a->_skb_refdst | skb_b->_skb_refdst)) ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/net/dst_metadata.h:69:2: note: Value assigned to 'a' a = (const struct metadata_dst *) skb_dst(skb_a); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/net/dst_metadata.h:72:6: note: Assuming 'a' is null if (!a != !b || a->type != b->type) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/net/dst_metadata.h:72:12: note: Assuming 'b' is null if (!a != !b || a->type != b->type) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/net/dst_metadata.h:72:6: note: Left side of '||' is false if (!a != !b || a->type != b->type) ^ include/net/dst_metadata.h:72:18: note: Access to field 'type' results in a dereference of a null pointer (loaded from variable 'a') if (!a != !b || a->type != b->type) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ net/core/dev.c:1037:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy] strcpy(name, dev->name); ^~~~~~ net/core/dev.c:1037:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 strcpy(name, dev->name); ^~~~~~ >> net/core/dev.c:7069:1: warning: Address of stack memory associated with >> local variable 'list' is still referred to by the global variable >> 'softnet_data' upon returning to the caller. This will be a dangling >> reference [clang-analyzer-core.StackAddressEscape] } ^ net/core/dev.c:7026:28: note: Loop condition is false. Exiting loop struct softnet_data *sd = this_cpu_ptr(&softnet_data); ^ include/linux/percpu-defs.h:265:27: note: expanded from macro 'this_cpu_ptr' #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr) ^ include/linux/percpu-defs.h:264:26: note: expanded from macro 'raw_cpu_ptr' #define raw_cpu_ptr(ptr) per_cpu_ptr(ptr, 0) ^ include/linux/percpu-defs.h:263:47: note: expanded from macro 'per_cpu_ptr' #define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); VERIFY_PERCPU_PTR(ptr); }) ^ include/linux/percpu-defs.h:259:2: note: expanded from macro 'VERIFY_PERCPU_PTR' __verify_pcpu_ptr(__p); \ ^ include/linux/percpu-defs.h:217:37: note: expanded from macro '__verify_pcpu_ptr' #define __verify_pcpu_ptr(ptr) \ ^ net/core/dev.c:7033:2: note: Loop condition is false. Exiting loop local_irq_disable(); ^ include/linux/irqflags.h:224:29: note: expanded from macro 'local_irq_disable' #define local_irq_disable() do { raw_local_irq_disable(); } while (0) ^ net/core/dev.c:7035:2: note: Loop condition is false. Exiting loop local_irq_enable(); ^ include/linux/irqflags.h:223:28: note: expanded from macro 'local_irq_enable' #define local_irq_enable() do { raw_local_irq_enable(); } while (0) ^ net/core/dev.c:7037:2: note: Loop condition is true. Entering loop body for (;;) { ^ net/core/dev.c:7040:3: note: Assuming the condition is false if (list_empty(&list)) { ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ net/core/dev.c:7040:3: note: '?' condition is false if (list_empty(&list)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ net/core/dev.c:7040:3: note: Assuming the condition is false if (list_empty(&list)) { ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ~~~~~~~~~~~~~~~~~^~~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ net/core/dev.c:7040:3: note: '?' condition is true if (list_empty(&list)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ net/core/dev.c:7040:3: note: Taking true branch if (list_empty(&list)) { ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ net/core/dev.c:7041:8: note: Left side of '&&' is true if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ net/core/dev.c:7041:4: note: Assuming the condition is false if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ net/core/dev.c:7041:4: note: '?' condition is false if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ net/core/dev.c:7041:8: note: Left side of '&&' is true if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ net/core/dev.c:7041:4: note: Assuming the condition is true if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ~~~~~~~~~~~~~~~~~^~~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ net/core/dev.c:7041:4: note: '?' condition is false if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ net/core/dev.c:7041:4: note: Taking false branch if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ net/core/dev.c:7043:4: note: Execution continues on line 7060 break; ^ net/core/dev.c:7060:2: note: Loop condition is false. Exiting loop local_irq_disable(); ^ include/linux/irqflags.h:224:29: note: expanded from macro 'local_irq_disable' #define local_irq_disable() do { raw_local_irq_disable(); } while (0) ^ net/core/dev.c:7065:6: note: Assuming the condition is false if (!list_empty(&sd->poll_list)) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ net/core/dev.c:7065:2: note: '?' condition is false if (!list_empty(&sd->poll_list)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ net/core/dev.c:7065:6: note: Assuming the condition is false if (!list_empty(&sd->poll_list)) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ net/core/dev.c:7065:2: note: '?' condition is false if (!list_empty(&sd->poll_list)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ net/core/dev.c:7065:2: note: Taking false branch if (!list_empty(&sd->poll_list)) ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ net/core/dev.c:7069:1: note: Address of stack memory associated with local variable 'list' is still referred to by the global variable 'softnet_data' upon returning to the caller. This will be a dangling reference } ^ >> net/core/dev.c:7069:1: warning: Address of stack memory associated with >> local variable 'repoll' is still referred to by the global variable >> 'softnet_data' upon returning to the caller. This will be a dangling >> reference [clang-analyzer-core.StackAddressEscape] } ^ net/core/dev.c:7026:28: note: Loop condition is false. Exiting loop struct softnet_data *sd = this_cpu_ptr(&softnet_data); ^ include/linux/percpu-defs.h:265:27: note: expanded from macro 'this_cpu_ptr' #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr) ^ include/linux/percpu-defs.h:264:26: note: expanded from macro 'raw_cpu_ptr' #define raw_cpu_ptr(ptr) per_cpu_ptr(ptr, 0) ^ include/linux/percpu-defs.h:263:47: note: expanded from macro 'per_cpu_ptr' #define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); VERIFY_PERCPU_PTR(ptr); }) ^ include/linux/percpu-defs.h:259:2: note: expanded from macro 'VERIFY_PERCPU_PTR' __verify_pcpu_ptr(__p); \ ^ include/linux/percpu-defs.h:217:37: note: expanded from macro '__verify_pcpu_ptr' #define __verify_pcpu_ptr(ptr) \ ^ net/core/dev.c:7033:2: note: Loop condition is false. Exiting loop local_irq_disable(); ^ include/linux/irqflags.h:224:29: note: expanded from macro 'local_irq_disable' #define local_irq_disable() do { raw_local_irq_disable(); } while (0) ^ net/core/dev.c:7035:2: note: Loop condition is false. Exiting loop local_irq_enable(); ^ include/linux/irqflags.h:223:28: note: expanded from macro 'local_irq_enable' #define local_irq_enable() do { raw_local_irq_enable(); } while (0) ^ net/core/dev.c:7037:2: note: Loop condition is true. Entering loop body for (;;) { ^ net/core/dev.c:7040:3: note: Assuming the condition is false if (list_empty(&list)) { ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ net/core/dev.c:7040:3: note: '?' condition is false if (list_empty(&list)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ net/core/dev.c:7040:3: note: Assuming the condition is false if (list_empty(&list)) { ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ~~~~~~~~~~~~~~~~~^~~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ net/core/dev.c:7040:3: note: '?' condition is true if (list_empty(&list)) { ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value' (cond) ? \ ^ net/core/dev.c:7040:3: note: Taking true branch if (list_empty(&list)) { ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ net/core/dev.c:7041:8: note: Left side of '&&' is true if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ net/core/dev.c:7041:4: note: Assuming the condition is false if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:45: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ net/core/dev.c:7041:4: note: '?' condition is false if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) ^ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) vim +7069 net/core/dev.c 29863d41bb6e1d Wei Wang 2021-02-08 7023 0766f788eb727e Emese Revfy 2016-06-20 7024 static __latent_entropy void net_rx_action(struct softirq_action *h) 726ce70e9e4050 Herbert Xu 2014-12-21 7025 { 726ce70e9e4050 Herbert Xu 2014-12-21 7026 struct softnet_data *sd = this_cpu_ptr(&softnet_data); 7acf8a1e8a28b3 Matthew Whitehead 2017-04-19 7027 unsigned long time_limit = jiffies + 7acf8a1e8a28b3 Matthew Whitehead 2017-04-19 7028 usecs_to_jiffies(netdev_budget_usecs); 726ce70e9e4050 Herbert Xu 2014-12-21 7029 int budget = netdev_budget; 726ce70e9e4050 Herbert Xu 2014-12-21 7030 LIST_HEAD(list); 726ce70e9e4050 Herbert Xu 2014-12-21 7031 LIST_HEAD(repoll); 726ce70e9e4050 Herbert Xu 2014-12-21 7032 726ce70e9e4050 Herbert Xu 2014-12-21 7033 local_irq_disable(); 726ce70e9e4050 Herbert Xu 2014-12-21 7034 list_splice_init(&sd->poll_list, &list); 726ce70e9e4050 Herbert Xu 2014-12-21 7035 local_irq_enable(); 726ce70e9e4050 Herbert Xu 2014-12-21 7036 ceb8d5bf17d366 Herbert Xu 2014-12-21 7037 for (;;) { 726ce70e9e4050 Herbert Xu 2014-12-21 7038 struct napi_struct *n; 726ce70e9e4050 Herbert Xu 2014-12-21 7039 ceb8d5bf17d366 Herbert Xu 2014-12-21 7040 if (list_empty(&list)) { ceb8d5bf17d366 Herbert Xu 2014-12-21 7041 if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll)) fec6e49b639896 Alexander Lobakin 2021-02-13 7042 return; ceb8d5bf17d366 Herbert Xu 2014-12-21 7043 break; ceb8d5bf17d366 Herbert Xu 2014-12-21 7044 } ceb8d5bf17d366 Herbert Xu 2014-12-21 7045 6bd373ebbac4b1 Herbert Xu 2014-12-21 7046 n = list_first_entry(&list, struct napi_struct, poll_list); 6bd373ebbac4b1 Herbert Xu 2014-12-21 7047 budget -= napi_poll(n, &repoll); 6bd373ebbac4b1 Herbert Xu 2014-12-21 7048 726ce70e9e4050 Herbert Xu 2014-12-21 7049 /* If softirq window is exhausted then punt. 726ce70e9e4050 Herbert Xu 2014-12-21 7050 * Allow this to run for 2 jiffies since which will allow 726ce70e9e4050 Herbert Xu 2014-12-21 7051 * an average latency of 1.5/HZ. 726ce70e9e4050 Herbert Xu 2014-12-21 7052 */ ceb8d5bf17d366 Herbert Xu 2014-12-21 7053 if (unlikely(budget <= 0 || ceb8d5bf17d366 Herbert Xu 2014-12-21 7054 time_after_eq(jiffies, time_limit))) { ceb8d5bf17d366 Herbert Xu 2014-12-21 7055 sd->time_squeeze++; ceb8d5bf17d366 Herbert Xu 2014-12-21 7056 break; ceb8d5bf17d366 Herbert Xu 2014-12-21 7057 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 7058 } d75b1ade567ffa Eric Dumazet 2014-11-02 7059 d75b1ade567ffa Eric Dumazet 2014-11-02 7060 local_irq_disable(); d75b1ade567ffa Eric Dumazet 2014-11-02 7061 d75b1ade567ffa Eric Dumazet 2014-11-02 7062 list_splice_tail_init(&sd->poll_list, &list); d75b1ade567ffa Eric Dumazet 2014-11-02 7063 list_splice_tail(&repoll, &list); d75b1ade567ffa Eric Dumazet 2014-11-02 7064 list_splice(&list, &sd->poll_list); d75b1ade567ffa Eric Dumazet 2014-11-02 7065 if (!list_empty(&sd->poll_list)) d75b1ade567ffa Eric Dumazet 2014-11-02 7066 __raise_softirq_irqoff(NET_RX_SOFTIRQ); d75b1ade567ffa Eric Dumazet 2014-11-02 7067 e326bed2f47d03 Eric Dumazet 2010-04-22 7068 net_rps_action_and_irq_enable(sd); ^1da177e4c3f41 Linus Torvalds 2005-04-16 @7069 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 7070 :::::: The code at line 7069 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <[email protected]> :::::: CC: Linus Torvalds <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected] _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
