From 44c10404c13604d1c98e285ff1c4bf821da80240 Mon Sep 17 00:00:00 2001
From: Magali Lemes <magalilemes00@gmail.com>
Date: Mon, 21 Feb 2022 20:07:41 -0300
Subject: [PATCH] powerpc: Fix missing declaration of
[en/dis]able_kernel_altivec()
When CONFIG_PPC64 is set and CONFIG_ALTIVEC is not the following build
failures occur:
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/dc_fpu.c: In function 'dc_fpu_begin':
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/dc_fpu.c:61:17: error: implicit declaration of function 'enable_kernel_altivec'; did you mean 'enable_kernel_vsx'? [-Werror=implicit-function-declaration]
61 | enable_kernel_altivec();
| ^~~~~~~~~~~~~~~~~~~~~
| enable_kernel_vsx
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/dc_fpu.c: In function 'dc_fpu_end':
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/dc_fpu.c:89:17: error: implicit declaration of function 'disable_kernel_altivec'; did you mean 'disable_kernel_vsx'? [-Werror=implicit-function-declaration]
89 | disable_kernel_altivec();
| ^~~~~~~~~~~~~~~~~~~~~~
| disable_kernel_vsx
cc1: some warnings being treated as errors
This commit adds stub instances of both enable_kernel_altivec() and
disable_kernel_altivec() the same way as done in commit bd73758803c2
regarding enable_kernel_vsx() and disable_kernel_vsx().
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Magali Lemes <magalilemes00@gmail.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220221230741.293064-1-magalilemes00@gmail.com
---
arch/powerpc/include/asm/switch_to.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
index 1f43ef6960339..aee25e3ebf960 100644
--- a/arch/powerpc/include/asm/switch_to.h
+++ b/arch/powerpc/include/asm/switch_to.h
@@ -62,6 +62,15 @@ static inline void disable_kernel_altivec(void)
#else
static inline void save_altivec(struct task_struct *t) { }
static inline void __giveup_altivec(struct task_struct *t) { }
+static inline void enable_kernel_altivec(void)
+{
+ BUILD_BUG();
+}
+
+static inline void disable_kernel_altivec(void)
+{
+ BUILD_BUG();
+}
#endif
#ifdef CONFIG_VSX
--
2.30.2