@@ -35,6 +35,8 @@
#include "internal.h"
+#define NO_KEY -1
+
static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
unsigned long addr, unsigned long end, pgprot_t newprot,
int dirty_accountable, int prot_numa)
@@ -452,9 +454,9 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
}
/*
- * pkey==-1 when doing a legacy mprotect()
+ * When pkey==NO_KEY we get legacy mprotect behavior here.
*/
-static int do_mprotect_pkey(unsigned long start, size_t len,
+static int do_mprotect_ext(unsigned long start, size_t len,
unsigned long prot, int pkey)
{
unsigned long nstart, end, tmp, reqprot;
@@ -578,7 +580,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
unsigned long, prot)
{
- return do_mprotect_pkey(start, len, prot, -1);
+ return do_mprotect_ext(start, len, prot, NO_KEY);
}
#ifdef CONFIG_ARCH_HAS_PKEYS
@@ -586,7 +588,7 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
SYSCALL_DEFINE4(pkey_mprotect, unsigned long, start, size_t, len,
unsigned long, prot, int, pkey)
{
- return do_mprotect_pkey(start, len, prot, pkey);
+ return do_mprotect_ext(start, len, prot, pkey);
}
SYSCALL_DEFINE2(pkey_alloc, unsigned long, flags, unsigned long, init_val)