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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-07 10:56:04 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-17 00:09:10 +1000 |
| commit | 45b30fafe528601f1a4449c9d68d8ebe7bbc39ad (patch) | |
| tree | 0e9c004ec205051e1ad08b924548777052f5c51a /arch/powerpc/mm/mem.c | |
| parent | a1ea0ca8a6f17d7b79bbc4d05dd4e6ca162d8f15 (diff) | |
| download | linux-45b30fafe528601f1a4449c9d68d8ebe7bbc39ad.tar.bz2 | |
powerpc: Define empty_zero_page[] in C
At the time being, empty_zero_page[] is defined in each
platform head.S.
Define it in mm/mem.c instead, and put it in BSS section instead
of the DATA section. Commit 5227cfa71f9e ("arm64: mm: place
empty_zero_page in bss") explains why it is interesting to have
it in BSS.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/5838caffa269e0957c5a50cc85477876220298b0.1623063174.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm/mem.c')
| -rw-r--r-- | arch/powerpc/mm/mem.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index a6b36a40897a..77fce7aa7dc5 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -28,6 +28,9 @@ unsigned long long memory_limit; bool init_mem_is_free; +unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss; +EXPORT_SYMBOL(empty_zero_page); + pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, pgprot_t vma_prot) { |