xtensa: fix syscall_set_return_value

jcmvbkbc · jcmvbkbc · commit c2d9aa3b6e56 · 2019-11-26T12:01:45.000-08:00
syscall return value is in the register a2, not a0. Cc: stable@vger.kernel.org # v5.0+ Fixes: 9f24f3c ("xtensa: implement tracehook functions and enable HAVE_ARCH_TRACEHOOK") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
@@ -51,7 +51,7 @@ static inline void syscall_set_return_value(struct task_struct *task,
 					    struct pt_regs *regs,
 					    int error, long val)
 {
-	regs->areg[0] = (long) error ? error : val;
+	regs->areg[2] = (long) error ? error : val;
 }
 
 #define SYSCALL_MAX_ARGS 6

Original file line number	Diff line number	Diff line change
`@@ -51,7 +51,7 @@ static inline void syscall_set_return_value(struct task_struct *task,`
`51`	`51`	`struct pt_regs *regs,`
`52`	`52`	`int error, long val)`
`53`	`53`	`{`
`54`		`- regs->areg[0] = (long) error ? error : val;`
	`54`	`+ regs->areg[2] = (long) error ? error : val;`
`55`	`55`	`}`
`56`	`56`
`57`	`57`	`#define SYSCALL_MAX_ARGS 6`