> Some drivers can use vmap in drm_panic, however, vmap is sleepable and > takes locks. Since drm_panic will vmap in panic handler, atomic_vmap > requests pages with GFP_ATOMIC and maps KVA without locks and sleep. See also: https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.14-rc5#n94 Regards, Markus
