[PATCH v2] x86/sgx: use vm_flags_t for vm_prot_bits

[Wentong Tian <tianwentong2000@gmail.com>]

The vm_flags_t type is the dedicated type for virtual memory flags.
Architecture and driver code should use this type instead of assuming
vm_flags is an unsigned long, as the underlying type may change in the
future.

This follows the cleanup in commit d75fa3c94750 ("mm: update
architecture and driver code to use vm_flags_t") by converting the
remaining vm_prot_bits usage in SGX code. Also, update the vm_max_prot_bits
type in struct sgx_encl_page to vm_flags_t for consistency.

No functional change intended.

Signed-off-by: Wentong Tian <tianwentong2000@gmail.com>
---
v2:
 - Also convert the type of vm_max_prot_bits in struct sgx_encl_page
   to vm_flags_t, as suggested.

 arch/x86/kernel/cpu/sgx/encl.c | 2 +-
 arch/x86/kernel/cpu/sgx/encl.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/sgx/encl.c b/arch/x86/kernel/cpu/sgx/encl.c
index cf149b9f4916..814edcde225d 100644
--- a/arch/x86/kernel/cpu/sgx/encl.c
+++ b/arch/x86/kernel/cpu/sgx/encl.c
@@ -281,7 +281,7 @@ static struct sgx_encl_page *sgx_encl_load_page_in_vma(struct sgx_encl *encl,
 						       unsigned long addr,
 						       vm_flags_t vm_flags)
 {
-	unsigned long vm_prot_bits = vm_flags & VM_ACCESS_FLAGS;
+	vm_flags_t vm_prot_bits = vm_flags & VM_ACCESS_FLAGS;
 	struct sgx_encl_page *entry;
 
 	entry = xa_load(&encl->page_array, PFN_DOWN(addr));
diff --git a/arch/x86/kernel/cpu/sgx/encl.h b/arch/x86/kernel/cpu/sgx/encl.h
index 8ff47f6652b9..0e0b97e91905 100644
--- a/arch/x86/kernel/cpu/sgx/encl.h
+++ b/arch/x86/kernel/cpu/sgx/encl.h
@@ -27,7 +27,7 @@
 
 struct sgx_encl_page {
 	unsigned long desc;
-	unsigned long vm_max_prot_bits:8;
+	vm_flags_t vm_max_prot_bits:8;
 	enum sgx_page_type type:16;
 	struct sgx_epc_page *epc_page;
 	struct sgx_encl *encl;
-- 
2.34.1