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Commit 099c81a1f0ab ("dax: Add dax_operations for use by fs-dax on fsdev dax") from Mar 27, 2026 (linux-next), leads to the following Smatch static checker warning: drivers/dax/fsdev.c:86 fsdev_dax_zero_page_range() error: uninitialized symbol 'kaddr'. drivers/dax/fsdev.c 79 static int fsdev_dax_zero_page_range(struct dax_device *dax_dev, 80 pgoff_t pgoff, size_t nr_pages) 81 { 82 void *kaddr; 83 84 WARN_ONCE(nr_pages > 1, "%s: nr_pages > 1\n", __func__); 85 __fsdev_dax_direct_access(dax_dev, pgoff, 1, DAX_ACCESS, &kaddr, NULL); The checker thinks __fsdev_dax_direct_access() can return -1. --> 86 fsdev_write_dax(kaddr, ZERO_PAGE(0), 0, PAGE_SIZE); ^^^^^ which means kaddr is uninitialized 87 return 0; 88 } regards, dan carpenter