b6fd9e2594
The semantics of pfn_valid() is to check presence of the memory map for a PFN and not whether a PFN is in RAM. The memory map may be present for a hole in the physical memory and if such hole corresponds to an MMIO range, __arm_ioremap_pfn_caller() will produce a WARN() and fail: Use memblock_is_map_memory() instead of pfn_valid() to check if a PFN is in RAM or not. -----BEGIN PGP SIGNATURE----- iQFHBAABCAAxFiEEeOVYVaWZL5900a/pOQOGJssO/ZEFAmDoctcTHHJwcHRAbGlu dXguaWJtLmNvbQAKCRA5A4Ymyw79kW1HCAC8lhm79EoktNw2+fumIfch15RjOGHC 8MfTSoPGJXLbwQXxBsTY8lGk8NRaLVRFDJ4OE8pMuwjCBbsgukg3oQUAbEt2n+zt DN4bCOV9vsunWs/w7S5xifFcNeeB3VqOjy2mFPaLpz3wj8fll+LtfghvHlXPyMSO xCO61F8AhsR4mUHeMmy5FRi0AG7fjYfaFrRYHqXQNAlnYqc3UgSSkfVViVEPeyOj TLefgjXkwCdrJ/84GRFkBqkXAz2vLNhic9BFt7YG2ZKbRDcAsQK5uqdmRR667edo Ca58NDOdsq3P2p+Qqum+JzWRc/F7/cGp+Twg+sA8sVvQ6Hr0TxmUNmsy =klV7 -----END PGP SIGNATURE----- Merge tag 'fixes-2021-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock Pull memblock fix from Mike Rapoport: "This is a fix for the rework of ARM's pfn_valid() implementation merged during this merge window. Don't abuse pfn_valid() to check if pfn is in RAM The semantics of pfn_valid() is to check presence of the memory map for a PFN and not whether a PFN is in RAM. The memory map may be present for a hole in the physical memory and if such hole corresponds to an MMIO range, __arm_ioremap_pfn_caller() will produce a WARN() and fail. Use memblock_is_map_memory() instead of pfn_valid() to check if a PFN is in RAM or not" * tag 'fixes-2021-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock: arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM