powerpc/mm/hash: Free the subpage_prot_table correctly

kvaneesh · mpe · commit 0da12a7a81f1 · 2017-07-27T13:05:50.000+10:00
Fixes: dad6f37 ("powerpc: subpage_protect: Increase the array size to take care of 64TB") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Tested-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c
@@ -36,7 +36,7 @@ void subpage_prot_free(struct mm_struct *mm)
 		}
 	}
 	addr = 0;
-	for (i = 0; i < 2; ++i) {
+	for (i = 0; i < (TASK_SIZE_USER64 >> 43); ++i) {
 		p = spt->protptrs[i];
 		if (!p)
 			continue;

Original file line number	Diff line number	Diff line change
`@@ -36,7 +36,7 @@ void subpage_prot_free(struct mm_struct *mm)`
`36`	`36`	`}`
`37`	`37`	`}`
`38`	`38`	`addr = 0;`
`39`		`- for (i = 0; i < 2; ++i) {`
	`39`	`+ for (i = 0; i < (TASK_SIZE_USER64 >> 43); ++i) {`
`40`	`40`	`p = spt->protptrs[i];`
`41`	`41`	`if (!p)`
`42`	`42`	`continue;`