diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-09-12 22:17:23 +0200 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-10-08 11:11:27 +0200 |
| commit | c4673ca7850dae7146ecc35c69e8f17f2337c7d2 (patch) | |
| tree | b84f78bb52deaa7b77f0ee95becd540c94d7b76f /arch/s390 | |
| parent | 63d832d826b75fec2ed062e5a5dc107c5a5db158 (diff) | |
mm: export symbol dependencies of is_zero_pfn()
In order to make the static inline function is_zero_pfn() callable by
modules, export its symbol dependencies 'zero_pfn' and (for s390 and
mips) 'zero_page_mask'.
We need this for KVM, as CONFIG_KVM is a tristate for all supported
architectures except ARM and arm64, and testing a pfn whether it refers
to the zero page is required to correctly distinguish the zero page
from other special RAM ranges that may also have the PG_reserved bit
set, but need to be treated as MMIO memory.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 0b70068e47e8f0c813a902dc3d6def601fd15acb)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/mm/init.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index eba15f18fd38..a4dfc0bd05db 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -43,6 +43,7 @@ pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE))); unsigned long empty_zero_page, zero_page_mask; EXPORT_SYMBOL(empty_zero_page); +EXPORT_SYMBOL(zero_page_mask); static void __init setup_zero_pages(void) { |