PTE_PROT_NONE means that a pte is present but does not have any
read/write attributes. However, setting the memory type like
pgprot_writecombine() is allowed and such bits overlap with
PTE_PROT_NONE. This causes mmap/munmap issues in drivers that change the
vma->vm_pg_prot on PROT_NONE mappings.
This patch reverts the PTE_FILE/PTE_PROT_NONE shift in commit
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| .. | ||
| boot | ||
| configs | ||
| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| mm | ||
| xen | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||