I'm using cppcheck 2.3.

Command line arguments are given below.

cppcheck --language=c --enable=warning --force memcontrol.c

Output is given below.

Checking mm/memcontrol.c ... mm/memcontrol.c:3397:7: error: Uninitialized variable: ret [uninitvar] if (!ret && enlarge) ^ mm/memcontrol.c:3400:9: error: Uninitialized variable: ret [uninitvar] return ret; ^ Checking mm/memcontrol.c: CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH... Checking mm/memcontrol.c: CONFIG_CGROUP_WRITEBACK... Checking mm/memcontrol.c: CONFIG_CMA;CONFIG_COMPACTION... Checking mm/memcontrol.c: CONFIG_DEBUG_FS;CONFIG_SLUB_DEBUG... Checking mm/memcontrol.c: CONFIG_DEBUG_MEMORY_INIT... Checking mm/memcontrol.c: CONFIG_DEBUG_SLAB... Checking mm/memcontrol.c: CONFIG_DEBUG_VM... Checking mm/memcontrol.c: CONFIG_DEVICE_PRIVATE;CONFIG_SWAP;CONFIG_MMU... Checking mm/memcontrol.c: CONFIG_LOCKDEP... Checking mm/memcontrol.c: CONFIG_MEMCG_KMEM... Checking mm/memcontrol.c: CONFIG_MEMCG_KMEM;CONFIG_SLAB;CONFIG_SLUB_DEBUG... Checking mm/memcontrol.c: CONFIG_MEMCG_SWAP... Checking mm/memcontrol.c: CONFIG_MMU... Checking mm/memcontrol.c: CONFIG_MMU;CONFIG_TRANSPARENT_HUGEPAGE... Checking mm/memcontrol.c: CONFIG_NUMA... Checking mm/memcontrol.c: CONFIG_PRINTK... Checking mm/memcontrol.c: CONFIG_PROVE_LOCKING... Checking mm/memcontrol.c: CONFIG_SLAB... Checking mm/memcontrol.c: CONFIG_SLAB;CONFIG_SLUB_DEBUG... Checking mm/memcontrol.c: CONFIG_SLAB_FREELIST_RANDOM... Checking mm/memcontrol.c: CONFIG_SLOB... Checking mm/memcontrol.c: CONFIG_SLUB... Checking mm/memcontrol.c: CONFIG_SLUB;CONFIG_SLUB_DEBUG... Checking mm/memcontrol.c: CONFIG_SLUB_DEBUG... Checking mm/memcontrol.c: CONFIG_SLUB_DEBUG;CONFIG_SLUB_DEBUG_ON... Checking mm/memcontrol.c: CONFIG_SMP... Checking mm/memcontrol.c: CONFIG_SPARSEMEM... Checking mm/memcontrol.c: CONFIG_SWAP... Checking mm/memcontrol.c: CONFIG_TRANSPARENT_HUGEPAGE... Checking mm/memcontrol.c: CONFIG_ZONE_DMA32...