mips: add +1 to __NR_syscalls in uapi header

All other architectures are hold a value for __NR_syscalls will
be equal to the last system call number +1.

But in mips architecture, __NR_syscalls hold the value equal to
total number of system exits in the architecture. One of the
patch in this patch series will genarate uapi header files.

In order to make the implementation common across all architect-
ures, add +1 to __NR_syscalls, which will be equal to the last
system call number +1.
Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: y2038@lists.linaro.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: arnd@arndb.de
Cc: deepa.kernel@gmail.com
Cc: marcin.juszkiewicz@linaro.org

arch/mips/include/uapi/asm/unistd.h

@@ -392,13 +392,13 @@
 #define __NR_io_pgetevents		(__NR_Linux + 368)
 
 #ifdef __KERNEL__
-#define __NR_syscalls			368
+#define __NR_syscalls			369
 #endif
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
 
 #define __NR_O32_Linux			4000
-#define __NR_O32_Linux_syscalls		368
+#define __NR_O32_Linux_syscalls		369
 
 #if _MIPS_SIM == _MIPS_SIM_ABI64
 
@@ -737,13 +737,13 @@
 #define __NR_io_pgetevents		(__NR_Linux + 328)
 
 #ifdef __KERNEL__
-#define __NR_syscalls			328
+#define __NR_syscalls			329
 #endif
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 */
 
 #define __NR_64_Linux			5000
-#define __NR_64_Linux_syscalls		328
+#define __NR_64_Linux_syscalls		329
 
 #if _MIPS_SIM == _MIPS_SIM_NABI32
 
@@ -1086,12 +1086,12 @@
 #define __NR_io_pgetevents		(__NR_Linux + 332)
 
 #ifdef __KERNEL__
-#define __NR_syscalls			332
+#define __NR_syscalls			333
 #endif
 
 #endif /* _MIPS_SIM == _MIPS_SIM_NABI32 */
 
 #define __NR_N32_Linux			6000
-#define __NR_N32_Linux_syscalls		332
+#define __NR_N32_Linux_syscalls		333
 
 #endif /* _UAPI_ASM_UNISTD_H */

arch/mips/kernel/ftrace.c

@@ -410,13 +410,13 @@ unsigned long __init arch_syscall_addr(int nr)
 unsigned long __init arch_syscall_addr(int nr)
 {
 #ifdef CONFIG_MIPS32_N32
-	if (nr >= __NR_N32_Linux && nr <= __NR_N32_Linux + __NR_N32_Linux_syscalls)
+	if (nr >= __NR_N32_Linux && nr < __NR_N32_Linux + __NR_N32_Linux_syscalls)
 		return (unsigned long)sysn32_call_table[nr - __NR_N32_Linux];
 #endif
-	if (nr >= __NR_64_Linux  && nr <= __NR_64_Linux + __NR_64_Linux_syscalls)
+	if (nr >= __NR_64_Linux  && nr < __NR_64_Linux + __NR_64_Linux_syscalls)
 		return (unsigned long)sys_call_table[nr - __NR_64_Linux];
 #ifdef CONFIG_MIPS32_O32
-	if (nr >= __NR_O32_Linux && nr <= __NR_O32_Linux + __NR_O32_Linux_syscalls)
+	if (nr >= __NR_O32_Linux && nr < __NR_O32_Linux + __NR_O32_Linux_syscalls)
 		return (unsigned long)sys32_call_table[nr - __NR_O32_Linux];
 #endif
 

arch/mips/kernel/scall32-o32.S

@@ -86,7 +86,7 @@ loads_done:
 	bnez	t0, syscall_trace_entry # -> yes
 syscall_common:
 	subu	v0, v0, __NR_O32_Linux	# check syscall number
-	sltiu	t0, v0, __NR_O32_Linux_syscalls + 1
+	sltiu	t0, v0, __NR_O32_Linux_syscalls
 	beqz	t0, illegal_syscall
 
 	sll	t0, v0, 2
@@ -182,7 +182,7 @@ illegal_syscall:
 
 	LEAF(sys_syscall)
 	subu	t0, a0, __NR_O32_Linux	# check syscall number
-	sltiu	v0, t0, __NR_O32_Linux_syscalls + 1
+	sltiu	v0, t0, __NR_O32_Linux_syscalls
 	beqz	t0, einval		# do not recurse
 	sll	t1, t0, 2
 	beqz	v0, einval

arch/mips/kernel/scall64-n32.S

@@ -33,7 +33,7 @@ NESTED(handle_sysn32, PT_SIZE, sp)
 #endif
 
 	dsubu	t0, v0, __NR_N32_Linux	# check syscall number
-	sltiu	t0, t0, __NR_N32_Linux_syscalls + 1
+	sltiu	t0, t0, __NR_N32_Linux_syscalls
 
 #ifndef CONFIG_MIPS32_O32
 	ld	t1, PT_EPC(sp)		# skip syscall on return
@@ -87,7 +87,7 @@ n32_syscall_trace_entry:
 	ld	a5, PT_R9(sp)
 
 	dsubu	t2, v0, __NR_N32_Linux	# check (new) syscall number
-	sltiu   t0, t2, __NR_N32_Linux_syscalls + 1
+	sltiu   t0, t2, __NR_N32_Linux_syscalls
 	beqz	t0, not_n32_scall
 
 	j	syscall_common

arch/mips/kernel/scall64-n64.S

@@ -54,7 +54,7 @@ NESTED(handle_sys64, PT_SIZE, sp)
 
 syscall_common:
 	dsubu	t2, v0, __NR_64_Linux
-	sltiu   t0, t2, __NR_64_Linux_syscalls + 1
+	sltiu   t0, t2, __NR_64_Linux_syscalls
 	beqz	t0, illegal_syscall
 
 	dsll	t0, t2, 3		# offset into table

arch/mips/kernel/scall64-o32.S

@@ -34,7 +34,7 @@ NESTED(handle_sys, PT_SIZE, sp)
 	ld	t1, PT_EPC(sp)		# skip syscall on return
 
 	dsubu	t0, v0, __NR_O32_Linux	# check syscall number
-	sltiu	t0, t0, __NR_O32_Linux_syscalls + 1
+	sltiu	t0, t0, __NR_O32_Linux_syscalls
 	daddiu	t1, 4			# skip to next instruction
 	sd	t1, PT_EPC(sp)
 	beqz	t0, not_o32_scall
@@ -144,7 +144,7 @@ trace_a_syscall:
 	ld	a7, PT_R11(sp)		# For indirect syscalls
 
 	dsubu	t0, v0, __NR_O32_Linux	# check (new) syscall number
-	sltiu	t0, t0, __NR_O32_Linux_syscalls + 1
+	sltiu	t0, t0, __NR_O32_Linux_syscalls
 	beqz	t0, not_o32_scall
 
 	j	syscall_common
@@ -193,7 +193,7 @@ not_o32_scall:
 
 LEAF(sys32_syscall)
 	subu	t0, a0, __NR_O32_Linux	# check syscall number
-	sltiu	v0, t0, __NR_O32_Linux_syscalls + 1
+	sltiu	v0, t0, __NR_O32_Linux_syscalls
 	beqz	t0, einval		# do not recurse
 	dsll	t1, t0, 3
 	beqz	v0, einval