]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm: provide a fallback for PAGE_KERNEL_RO for architectures
authorLuis R. Rodriguez <mcgrof@kernel.org>
Fri, 17 Aug 2018 22:46:29 +0000 (15:46 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 17 Aug 2018 23:20:29 +0000 (16:20 -0700)
commita3266bd49c721e2e0a71f352d83713fbd60caadb
tree2a1fd45483467ffd8687f60e06c9b497dc40aee0
parent3172e5e61c8a78f690c50f221fdeedce35d0b1e4
mm: provide a fallback for PAGE_KERNEL_RO for architectures

Some architectures do not define certain PAGE_KERNEL_* flags, this is
either because:

 a) The way to implement some of these flags is *not yet ported*, or
 b) The architecture *has no way* to describe them

Over time we have accumulated a few PAGE_KERNEL_* fallback workarounds
for architectures in the kernel which do not define them using
*relatively safe* equivalents.  Move these scattered fallback hacks into
asm-generic.

We start off with PAGE_KERNEL_RO using PAGE_KERNEL as a fallback.  This
has been in place on the firmware loader for years.  Move the fallback
into the respective asm-generic header.

Link: http://lkml.kernel.org/r/20180510185507.2439-2-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/base/firmware_loader/fallback.c
include/asm-generic/pgtable.h