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arch: Add generic Kconfig option indicating page size smaller than 64k

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NTFS_RW and VMXNET3 require a page size smaller than 64kB.  Add generic
Kconfig option for use outside architecture code to avoid architecture
specific Kconfig options in that code.

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: Anton Altaparmakov <anton@tuxera.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Guenter Roeck 2021-11-27 07:44:40 -08:00 committed by Linus Torvalds
parent 4f0dda359c
commit 1f0e290cc5
1 changed files with 10 additions and 0 deletions
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arch/Kconfig
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@ -991,6 +991,16 @@ config HAVE_ARCH_COMPAT_MMAP_BASES
and vice-versa 32-bit applications to call 64-bit mmap().
Required for applications doing different bitness syscalls.
config PAGE_SIZE_LESS_THAN_64KB
def_bool y
depends on !ARM64_64K_PAGES
depends on !IA64_PAGE_SIZE_64KB
depends on !PAGE_SIZE_64KB
depends on !PARISC_PAGE_SIZE_64KB
depends on !PPC_64K_PAGES
depends on !PPC_256K_PAGES
depends on !PAGE_SIZE_256KB
# This allows to use a set of generic functions to determine mmap base
# address by giving priority to top-down scheme only if the process
# is not in legacy mode (compat task, unlimited stack size or