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(parent: 0042090) | patch
mm: Allow arm64 mmap(PROT_MTE) on RAM-based files
authorCatalin Marinas <catalin.marinas@arm.com>
Fri, 29 Nov 2019 12:45:08 +0000 (12:45 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 4 Sep 2020 11:46:07 +0000 (12:46 +0100)
commit51b0bff2f703f7ecfeb228eaa3d8f6090c18c9c1
tree1d0e741b92f8de57074a275de0868ea5071c70eatree | snapshot
parent0042090548740921951f31fc0c20dcdb96638cb0commit | diff
mm: Allow arm64 mmap(PROT_MTE) on RAM-based files

Since arm64 memory (allocation) tags can only be stored in RAM, mapping
files with PROT_MTE is not allowed by default. RAM-based files like
those in a tmpfs mount or memfd_create() can support memory tagging, so
update the vm_flags accordingly in shmem_mmap().

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
mm/shmem.c diff | blob | history
Domain: System / Kernel;