:::::: :::::: Manual check reason: "low confidence static check warning: drivers/vhost/vdpa.c:614:2: warning: Value stored to 'range_size' is never read [clang-analyzer-deadcode.DeadStores]" ::::::
CC: [email protected] CC: [email protected] BCC: [email protected] In-Reply-To: <[email protected]> References: <[email protected]> TO: Cindy Lu <[email protected]> Hi Cindy, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on v5.18] [cannot apply to mst-vhost/linux-next next-20220603] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Cindy-Lu/vdpa-Do-not-count-the-pages-that-were-already-pinned-in-the-vhost-vDPA/20220601-092308 base: 4b0986a3613c92f4ec1bdc7f60ec66fea135991f :::::: branch date: 4 days ago :::::: commit date: 4 days ago config: i386-randconfig-c001 (https://download.01.org/0day-ci/archive/20220604/[email protected]/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c825abd6b0198fb088d9752f556a70705bc99dfd) 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 # https://github.com/intel-lab-lkp/linux/commit/8f0b25afe9ac570a70eafb5c285747e3bdd2471d git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Cindy-Lu/vdpa-Do-not-count-the-pages-that-were-already-pinned-in-the-vhost-vDPA/20220601-092308 git checkout 8f0b25afe9ac570a70eafb5c285747e3bdd2471d # save the config file COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 clang-analyzer If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) ^ arch/x86/include/asm/string_32.h:150:25: note: expanded from macro 'memcpy' #define memcpy(t, f, n) __builtin_memcpy(t, f, n) ^~~~~~~~~~~~~~~~ net/ipv6/addrconf.c:7150:4: note: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11 memcpy(dflt, ^ arch/x86/include/asm/string_32.h:150:25: note: expanded from macro 'memcpy' #define memcpy(t, f, n) __builtin_memcpy(t, f, n) ^~~~~~~~~~~~~~~~ Suppressed 106 warnings (106 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 47 warnings generated. drivers/md/dm-thin.c:1269:2: warning: Call to function 'memset' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memset_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling] memset(m, 0, sizeof(struct dm_thin_new_mapping)); ^ arch/x86/include/asm/string_32.h:195:29: note: expanded from macro 'memset' #define memset(s, c, count) __builtin_memset(s, c, count) ^~~~~~~~~~~~~~~~ drivers/md/dm-thin.c:1269:2: note: Call to function 'memset' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memset_s' in case of C11 memset(m, 0, sizeof(struct dm_thin_new_mapping)); ^ arch/x86/include/asm/string_32.h:195:29: note: expanded from macro 'memset' #define memset(s, c, count) __builtin_memset(s, c, count) ^~~~~~~~~~~~~~~~ drivers/md/dm-thin.c:3990:10: warning: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling] format_dev_t(buf, pt->metadata_dev->bdev->bd_dev), ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:3990:10: note: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 format_dev_t(buf, pt->metadata_dev->bdev->bd_dev), ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:3991:10: warning: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling] format_dev_t(buf2, pt->data_dev->bdev->bd_dev), ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:3991:10: note: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 format_dev_t(buf2, pt->data_dev->bdev->bd_dev), ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:4407:11: warning: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling] format_dev_t(buf, tc->pool_dev->bdev->bd_dev), ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:4407:11: note: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 format_dev_t(buf, tc->pool_dev->bdev->bd_dev), ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:4410:19: warning: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling] DMEMIT(" %s", format_dev_t(buf, tc->origin_dev->bdev->bd_dev)); ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ drivers/md/dm-thin.c:4410:19: note: Call to function 'sprintf' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'sprintf_s' in case of C11 DMEMIT(" %s", format_dev_t(buf, tc->origin_dev->bdev->bd_dev)); ^ include/linux/kdev_t.h:19:3: note: expanded from macro 'format_dev_t' sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \ ^~~~~~~ include/linux/device-mapper.h:600:46: note: expanded from macro 'DMEMIT' 0 : scnprintf(result + sz, maxlen - sz, x)) ^ Suppressed 42 warnings (42 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 84 warnings generated. >> drivers/vhost/vdpa.c:614:2: warning: Value stored to 'range_size' is never >> read [clang-analyzer-deadcode.DeadStores] range_size = range_start - range_last; ^ ~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:614:2: note: Value stored to 'range_size' is never read range_size = range_start - range_last; ^ ~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:719:40: warning: The right operand of '>=' is a garbage value [clang-analyzer-core.UndefinedBinaryOperatorResult] if ((range_size >= 0) && (range_start >= node_last) && ^ 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)) ^~~~ drivers/vhost/vdpa.c:596:2: note: 'node_last' declared without an initial value u64 node_last; ^~~~~~~~~~~~~ drivers/vhost/vdpa.c:604:6: note: Assuming 'node_number' is not equal to 0 if (node_number == 0) { ^ 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)) ^~~~ drivers/vhost/vdpa.c:604:2: note: '?' condition is false if (node_number == 0) { ^ 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)) ^ drivers/vhost/vdpa.c:604:6: note: 'node_number' is not equal to 0 if (node_number == 0) { ^ 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) ? \ ^~~~ drivers/vhost/vdpa.c:604:2: note: '?' condition is false if (node_number == 0) { ^ 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) ? \ ^ drivers/vhost/vdpa.c:604:2: note: Taking false branch if (node_number == 0) { ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/vhost/vdpa.c:615:14: note: Assuming 'i' is >= 'node_number' for (i = 0; i < node_number; i++) { ^~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:615:2: note: Loop condition is false. Execution continues on line 715 for (i = 0; i < node_number; i++) { ^ drivers/vhost/vdpa.c:719:7: note: Assuming 'range_size' is >= 0 if ((range_size >= 0) && (range_start >= node_last) && ^ 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)) ^~~~ drivers/vhost/vdpa.c:719:6: note: Left side of '&&' is true if ((range_size >= 0) && (range_start >= node_last) && ^ drivers/vhost/vdpa.c:719:40: note: The right operand of '>=' is a garbage value if ((range_size >= 0) && (range_start >= node_last) && ^ 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)) ^~~~ >> drivers/vhost/vdpa.c:978:16: warning: Assigned value is garbage or undefined >> [clang-analyzer-core.uninitialized.Assign] pre_link_node = link_head_tmp; ^ drivers/vhost/vdpa.c:1589:2: note: Calling 'vhost_vdpa_iotlb_free' vhost_vdpa_iotlb_free(v); ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:1065:2: note: Calling 'vhost_vdpa_iotlb_unmap' vhost_vdpa_iotlb_unmap(v, 0ULL, 0ULL - 1); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:1055:2: note: Assuming field 'use_va' is false if (vdpa->use_va) ^ 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)) ^~~~ drivers/vhost/vdpa.c:1055:2: note: '?' condition is false if (vdpa->use_va) ^ 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)) ^ drivers/vhost/vdpa.c:1055:12: note: Field 'use_va' is false if (vdpa->use_va) ^ drivers/vhost/vdpa.c:1055:2: note: '?' condition is false if (vdpa->use_va) ^ 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) ? \ ^ drivers/vhost/vdpa.c:1055:2: note: Taking false branch if (vdpa->use_va) ^ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/vhost/vdpa.c:1058:9: note: Calling 'vhost_vdpa_pa_unmap' return vhost_vdpa_pa_unmap(v, start, last); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:1018:9: note: Assuming the condition is true while ((map = vhost_iotlb_itree_first(iotlb, start, last)) != NULL) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:1018:2: note: Loop condition is true. Entering loop body while ((map = vhost_iotlb_itree_first(iotlb, start, last)) != NULL) { ^ drivers/vhost/vdpa.c:1021:8: note: Assuming 'pinned' is <= 0 pinned > 0; pfn++, pinned--) { ^~~~~~~~~~ drivers/vhost/vdpa.c:1020:3: note: Loop condition is false. Execution continues on line 1028 for (pfn = PFN_DOWN(map->addr); ^ drivers/vhost/vdpa.c:1028:10: note: Calling 'vhost_vdpa_search_range_del' size = vhost_vdpa_search_range_del(dev->vdpa_mem_tree, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:1004:9: note: Calling 'vhost_vdpa_range_ops' size = vhost_vdpa_range_ops(root, start, last, false); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:941:2: note: 'link_head_tmp' declared without an initial value struct vdpa_link_node *link_head_tmp; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vdpa.c:946:2: note: Loop condition is true. Entering loop body for (node = interval_tree_iter_first(root, start, last); node; ^ drivers/vhost/vdpa.c:949:7: note: Assuming 'link_node' is equal to null if (link_node == NULL) { ^ 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)) ^~~~ drivers/vhost/vdpa.c:949:3: note: '?' condition is false if (link_node == NULL) { ^ 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)) ^ drivers/vhost/vdpa.c:949:7: note: 'link_node' is equal to null if (link_node == NULL) { ^ 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)) vim +/range_size +614 drivers/vhost/vdpa.c 8f0b25afe9ac57 Cindy Lu 2022-06-01 587 8f0b25afe9ac57 Cindy Lu 2022-06-01 588 u64 vhost_vdpa_range_ref_add(struct rb_root_cached *root, 8f0b25afe9ac57 Cindy Lu 2022-06-01 589 struct vdpa_link_node *link_head, int node_number, 8f0b25afe9ac57 Cindy Lu 2022-06-01 590 u64 start, u64 last) 8f0b25afe9ac57 Cindy Lu 2022-06-01 591 { 8f0b25afe9ac57 Cindy Lu 2022-06-01 592 int i = 0; 8f0b25afe9ac57 Cindy Lu 2022-06-01 593 u64 size = 0; 8f0b25afe9ac57 Cindy Lu 2022-06-01 594 int new_ref; 8f0b25afe9ac57 Cindy Lu 2022-06-01 595 u64 node_start; 8f0b25afe9ac57 Cindy Lu 2022-06-01 596 u64 node_last; 8f0b25afe9ac57 Cindy Lu 2022-06-01 597 u64 range_start; 8f0b25afe9ac57 Cindy Lu 2022-06-01 598 u64 range_last; 8f0b25afe9ac57 Cindy Lu 2022-06-01 599 int range_size; 8f0b25afe9ac57 Cindy Lu 2022-06-01 600 struct vdpa_link_node *link_node; 8f0b25afe9ac57 Cindy Lu 2022-06-01 601 struct vdpa_tree_node *vdpa_node = NULL; 8f0b25afe9ac57 Cindy Lu 2022-06-01 602 struct interval_tree_node *node = NULL; 8f0b25afe9ac57 Cindy Lu 2022-06-01 603 8f0b25afe9ac57 Cindy Lu 2022-06-01 604 if (node_number == 0) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 605 vhost_vdpa_add_range_ctx(root, start, last, 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 606 8f0b25afe9ac57 Cindy Lu 2022-06-01 607 size = last - start + 1; 8f0b25afe9ac57 Cindy Lu 2022-06-01 608 return size; 8f0b25afe9ac57 Cindy Lu 2022-06-01 609 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 610 8f0b25afe9ac57 Cindy Lu 2022-06-01 611 link_node = link_head; 8f0b25afe9ac57 Cindy Lu 2022-06-01 612 range_start = start; 8f0b25afe9ac57 Cindy Lu 2022-06-01 613 range_last = last; 8f0b25afe9ac57 Cindy Lu 2022-06-01 @614 range_size = range_start - range_last; 8f0b25afe9ac57 Cindy Lu 2022-06-01 615 for (i = 0; i < node_number; i++) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 616 vdpa_node = link_node->vdpa_node; 8f0b25afe9ac57 Cindy Lu 2022-06-01 617 link_node = link_node->next; 8f0b25afe9ac57 Cindy Lu 2022-06-01 618 node = &vdpa_node->tree_node; 8f0b25afe9ac57 Cindy Lu 2022-06-01 619 new_ref = vdpa_node->ref; 8f0b25afe9ac57 Cindy Lu 2022-06-01 620 node_start = node->start; 8f0b25afe9ac57 Cindy Lu 2022-06-01 621 node_last = node->last; 8f0b25afe9ac57 Cindy Lu 2022-06-01 622 8f0b25afe9ac57 Cindy Lu 2022-06-01 623 if (range_start == node_start) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 624 if (node_last < range_last) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 625 /* range_start= node->start--- node->last--range_last*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 626 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 627 node_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 628 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 629 /*count the next range */ 8f0b25afe9ac57 Cindy Lu 2022-06-01 630 } else if (node_last > range_last) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 631 /* range_start= node->start --- last -- node->last*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 632 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 633 range_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 634 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 635 vhost_vdpa_add_range_ctx(root, range_last + 1, 8f0b25afe9ac57 Cindy Lu 2022-06-01 636 node_last, new_ref); 8f0b25afe9ac57 Cindy Lu 2022-06-01 637 } else { 8f0b25afe9ac57 Cindy Lu 2022-06-01 638 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 639 node_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 640 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 641 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 642 } else if (node_start < range_start) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 643 if (range_last < node_last) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 644 /* node->start--- start--- last--- node->last*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 645 /* should the end rang*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 646 8f0b25afe9ac57 Cindy Lu 2022-06-01 647 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 648 range_start - 1, 8f0b25afe9ac57 Cindy Lu 2022-06-01 649 new_ref); 8f0b25afe9ac57 Cindy Lu 2022-06-01 650 vhost_vdpa_add_range_ctx(root, range_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 651 range_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 652 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 653 vhost_vdpa_add_range_ctx(root, range_last + 1, 8f0b25afe9ac57 Cindy Lu 2022-06-01 654 node_last, new_ref); 8f0b25afe9ac57 Cindy Lu 2022-06-01 655 8f0b25afe9ac57 Cindy Lu 2022-06-01 656 } else if (range_last > node_last) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 657 /* node->start--- start--- node->last-- last*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 658 8f0b25afe9ac57 Cindy Lu 2022-06-01 659 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 660 range_start - 1, 8f0b25afe9ac57 Cindy Lu 2022-06-01 661 new_ref); 8f0b25afe9ac57 Cindy Lu 2022-06-01 662 vhost_vdpa_add_range_ctx(root, range_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 663 node_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 664 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 665 } else { 8f0b25afe9ac57 Cindy Lu 2022-06-01 666 /* node->start--- start--- node->last= last*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 667 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 668 range_start - 1, 8f0b25afe9ac57 Cindy Lu 2022-06-01 669 new_ref); 8f0b25afe9ac57 Cindy Lu 2022-06-01 670 vhost_vdpa_add_range_ctx(root, range_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 671 node_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 672 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 673 /* should the end rang*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 674 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 675 } else { 8f0b25afe9ac57 Cindy Lu 2022-06-01 676 if (node_last < range_last) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 677 /* range_start --- node->start --- node->last ----last */ 8f0b25afe9ac57 Cindy Lu 2022-06-01 678 8f0b25afe9ac57 Cindy Lu 2022-06-01 679 vhost_vdpa_add_range_ctx(root, range_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 680 node_start - 1, 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 681 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 682 node_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 683 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 684 size += ((node_start - 1) - range_start) + 1; 8f0b25afe9ac57 Cindy Lu 2022-06-01 685 } else if (node_last > range_last) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 686 /* range_start--- node->start --- last -- node->last */ 8f0b25afe9ac57 Cindy Lu 2022-06-01 687 vhost_vdpa_add_range_ctx(root, range_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 688 node_start - 1, 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 689 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 690 range_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 691 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 692 vhost_vdpa_add_range_ctx(root, range_last + 1, 8f0b25afe9ac57 Cindy Lu 2022-06-01 693 node_last, new_ref); 8f0b25afe9ac57 Cindy Lu 2022-06-01 694 size += ((node_start - 1) - range_start) + 1; 8f0b25afe9ac57 Cindy Lu 2022-06-01 695 8f0b25afe9ac57 Cindy Lu 2022-06-01 696 /* should the end rang*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 697 } else { 8f0b25afe9ac57 Cindy Lu 2022-06-01 698 /* range_start--- node->start --- last = node->last */ 8f0b25afe9ac57 Cindy Lu 2022-06-01 699 vhost_vdpa_add_range_ctx(root, range_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 700 node_start - 1, 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 701 vhost_vdpa_add_range_ctx(root, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 702 node_last, 8f0b25afe9ac57 Cindy Lu 2022-06-01 703 new_ref + 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 704 size += ((node_start - 1) - range_start) + 1; 8f0b25afe9ac57 Cindy Lu 2022-06-01 705 8f0b25afe9ac57 Cindy Lu 2022-06-01 706 /* should the end rang*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 707 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 708 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 709 /* work in next node*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 710 range_start = node_last + 1; 8f0b25afe9ac57 Cindy Lu 2022-06-01 711 if (range_start > range_last) 8f0b25afe9ac57 Cindy Lu 2022-06-01 712 break; 8f0b25afe9ac57 Cindy Lu 2022-06-01 713 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 714 8f0b25afe9ac57 Cindy Lu 2022-06-01 715 range_size = range_last - range_start; 8f0b25afe9ac57 Cindy Lu 2022-06-01 716 8f0b25afe9ac57 Cindy Lu 2022-06-01 717 /* last round and still some range*/ 8f0b25afe9ac57 Cindy Lu 2022-06-01 718 8f0b25afe9ac57 Cindy Lu 2022-06-01 719 if ((range_size >= 0) && (range_start >= node_last) && 8f0b25afe9ac57 Cindy Lu 2022-06-01 720 (node_number == i + 1)) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 721 vhost_vdpa_add_range_ctx(root, range_start, range_last, 1); 8f0b25afe9ac57 Cindy Lu 2022-06-01 722 size = size + (range_last - range_start) + 1; 8f0b25afe9ac57 Cindy Lu 2022-06-01 723 } else if ((range_size == -1) && (node_number == i + 1)) { 8f0b25afe9ac57 Cindy Lu 2022-06-01 724 return size; 8f0b25afe9ac57 Cindy Lu 2022-06-01 725 } else { 8f0b25afe9ac57 Cindy Lu 2022-06-01 726 printk(KERN_WARNING, 8f0b25afe9ac57 Cindy Lu 2022-06-01 727 "%s %d FAIL start %lld last %lld node->start %lld node->last %lld i %d", 8f0b25afe9ac57 Cindy Lu 2022-06-01 728 __func__, __LINE__, range_start, range_last, node_start, 8f0b25afe9ac57 Cindy Lu 2022-06-01 729 node_last, i); 8f0b25afe9ac57 Cindy Lu 2022-06-01 730 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 731 8f0b25afe9ac57 Cindy Lu 2022-06-01 732 return size; 8f0b25afe9ac57 Cindy Lu 2022-06-01 733 } 8f0b25afe9ac57 Cindy Lu 2022-06-01 734 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
