[tip:x86/urgent] x86: Remove unused parameter of prepare_switch_to

[tip-bot for rodrigosiqueira]

Commit-ID:  7ac139eaa6bbdb07c547b6916a808eab3897e0e3
Gitweb:     https://git.kernel.org/tip/7ac139eaa6bbdb07c547b6916a808eab3897e0e3
Author:     rodrigosiqueira <rodrigosiqueiramelo@xxxxxxxxx>
AuthorDate: Fri, 15 Dec 2017 11:15:33 -0200
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 27 Dec 2017 20:37:41 +0100

x86: Remove unused parameter of prepare_switch_to

Commit e37e43a497d5 ("x86/mm/64: Enable vmapped stacks
(CONFIG_HAVE_ARCH_VMAP_STACK=y)") added prepare_switch_to with one extra
parameter which is not used by the function, remove it.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: kernel-janitors@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20171215131533.hp6kqebw45o7uvsb@xxxxxxxxxxxxxx

---
 arch/x86/include/asm/switch_to.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/switch_to.h b/arch/x86/include/asm/switch_to.h
index 8c6bd68..1008d46 100644
--- a/arch/x86/include/asm/switch_to.h
+++ b/arch/x86/include/asm/switch_to.h
@@ -16,8 +16,7 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
 		      struct tss_struct *tss);
 
 /* This runs runs on the previous thread's stack. */
-static inline void prepare_switch_to(struct task_struct *prev,
-				     struct task_struct *next)
+static inline void prepare_switch_to(struct task_struct *next)
 {
 #ifdef CONFIG_VMAP_STACK
 	/*
@@ -70,7 +69,7 @@ struct fork_frame {
 
 #define switch_to(prev, next, last)					\
 do {									\
-	prepare_switch_to(prev, next);					\
+	prepare_switch_to(next);					\
 									\
 	((last) = __switch_to_asm((prev), (next)));			\
 } while (0)