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Subject[PATCH v3 7/8] mm/vmalloc: add vmap_range_noflush variant
Date
As a side-effect, the order of flush_cache_vmap() and
arch_sync_kernel_mappings() calls are switched, but that now matches
the other callers in this file.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
mm/vmalloc.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 129f10545bb1..4e5cb7c7f780 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -234,8 +234,8 @@ static int vmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end,
return 0;
}

-int vmap_range(unsigned long addr, unsigned long end, phys_addr_t phys_addr, pgprot_t prot,
- unsigned int max_page_shift)
+static int vmap_range_noflush(unsigned long addr, unsigned long end, phys_addr_t phys_addr,
+ pgprot_t prot, unsigned int max_page_shift)
{
pgd_t *pgd;
unsigned long start;
@@ -255,14 +255,23 @@ int vmap_range(unsigned long addr, unsigned long end, phys_addr_t phys_addr, pgp
break;
} while (pgd++, phys_addr += (next - addr), addr = next, addr != end);

- flush_cache_vmap(start, end);
-
if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
arch_sync_kernel_mappings(start, end);

return err;
}

+int vmap_range(unsigned long addr, unsigned long end, phys_addr_t phys_addr, pgprot_t prot,
+ unsigned int max_page_shift)
+{
+ int err;
+
+ err = vmap_range_noflush(addr, end, phys_addr, prot, max_page_shift);
+ flush_cache_vmap(addr, end);
+
+ return err;
+}
+
static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
pgtbl_mod_mask *mask)
{
--
2.23.0
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