---------- Currently there are multiple layers of abstraction i.e __SXXX/__PXXX macros , protection_map[], arch_vm_get_page_prot() and arch_filter_pgprot() built between the platform and generic MM, finally defining vm_get_page_prot(). Hence this series proposes to drop all these abstraction levels and instead just move the responsibility of defining vm_get_page_prot() to the platform itself making it clean and simple. ---------- Benefits 1. For platforms using arch_vm_get_page_prot() and/or arch_filter_pgprot() - A simplified vm_get_page_prot() - Dropped arch_vm_get_page_prot() and arch_filter_pgprot() - Dropped __SXXX, __PXXX macros 2. For platforms which just exported __SXXX, __PXXX - A simplified vm_get_page_prot() - Dropped __SXXX, __PXXX macros 3. For core MM - Dropped a complex vm_get_page_prot() with multiple layers of abstraction i.e __SXXX/__PXXX macros, protection_map[], arch_vm_get_page_prot(), arch_filter_pgprot() etc. - Anshuman
