powerpc/kuap: Remove KUAP_CURRENT_XXX

book3s/32 was the only user of KUAP_CURRENT_XXX.

After rework of book3s/32 KUAP, it is not used anymore.

Remove them.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/549214ecf6887d965645e664520d4886663c5ffb.1622708530.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/book3s/32/kup.h

@@ -145,7 +145,6 @@ static __always_inline void allow_user_access(void __user *to, const void __user
 		return;
 
 	BUILD_BUG_ON(!__builtin_constant_p(dir));
-	BUILD_BUG_ON(dir & ~KUAP_READ_WRITE);
 
 	if (!(dir & KUAP_WRITE))
 		return;

arch/powerpc/include/asm/kup.h

@@ -5,14 +5,6 @@
 #define KUAP_READ	1
 #define KUAP_WRITE	2
 #define KUAP_READ_WRITE	(KUAP_READ | KUAP_WRITE)
-/*
- * For prevent_user_access() only.
- * Use the current saved situation instead of the to/from/size params.
- * Used on book3s/32
- */
-#define KUAP_CURRENT_READ	4
-#define KUAP_CURRENT_WRITE	8
-#define KUAP_CURRENT		(KUAP_CURRENT_READ | KUAP_CURRENT_WRITE)
 
 #ifdef CONFIG_PPC_BOOK3S_64
 #include <asm/book3s/64/kup.h>
@@ -129,17 +121,17 @@ static inline void prevent_read_write_user(void __user *to, const void __user *f
 
 static inline void prevent_current_access_user(void)
 {
-	prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT);
+	prevent_user_access(NULL, NULL, ~0UL, KUAP_READ_WRITE);
 }
 
 static inline void prevent_current_read_from_user(void)
 {
-	prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_READ);
+	prevent_user_access(NULL, NULL, ~0UL, KUAP_READ);
 }
 
 static inline void prevent_current_write_to_user(void)
 {
-	prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_WRITE);
+	prevent_user_access(NULL, NULL, ~0UL, KUAP_WRITE);
 }
 
 #endif /* !__ASSEMBLY__ */