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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-09-12 22:17:23 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-14 16:25:14 +0200 |
| commit | 0b70068e47e8f0c813a902dc3d6def601fd15acb (patch) | |
| tree | df0d682a73cad221961e96ee7a73f9c9d83bea66 /arch/s390/mm | |
| parent | powerpc/kvm/cma: Fix panic introduces by signed shift operation (diff) | |
| download | linux-0b70068e47e8f0c813a902dc3d6def601fd15acb.tar.xz linux-0b70068e47e8f0c813a902dc3d6def601fd15acb.zip | |
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>
Diffstat (limited to 'arch/s390/mm')
| -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 0c1073ed1e84..c7235e01fd67 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) { |