powerpc/mm/radix: Avoid flushing the PWC on every flush_tlb_range
We do that because it's used by THP pmd collapsing, so use
instead a dedicated flush function.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index 5cc50d4..5d05245 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -804,9 +804,12 @@ pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long addre
*/
pmd = *pmdp;
pmd_clear(pmdp);
+
/*FIXME!! Verify whether we need this kick below */
kick_all_cpus_sync();
- flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
+
+ radix__flush_tlb_collapsed_pmd(vma->vm_mm, address);
+
return pmd;
}