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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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44c10404c1
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 bd73758803
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
129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
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*/
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#ifndef _ASM_POWERPC_SWITCH_TO_H
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#define _ASM_POWERPC_SWITCH_TO_H
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#include <linux/sched.h>
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#include <asm/reg.h>
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struct thread_struct;
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struct task_struct;
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struct pt_regs;
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extern struct task_struct *__switch_to(struct task_struct *,
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struct task_struct *);
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#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
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extern struct task_struct *_switch(struct thread_struct *prev,
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struct thread_struct *next);
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extern void switch_booke_debug_regs(struct debug_reg *new_debug);
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extern int emulate_altivec(struct pt_regs *);
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#ifdef CONFIG_PPC_BOOK3S_64
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void restore_math(struct pt_regs *regs);
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#else
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static inline void restore_math(struct pt_regs *regs)
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{
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}
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#endif
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void restore_tm_state(struct pt_regs *regs);
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extern void flush_all_to_thread(struct task_struct *);
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extern void giveup_all(struct task_struct *);
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#ifdef CONFIG_PPC_FPU
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extern void enable_kernel_fp(void);
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extern void flush_fp_to_thread(struct task_struct *);
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extern void giveup_fpu(struct task_struct *);
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extern void save_fpu(struct task_struct *);
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static inline void disable_kernel_fp(void)
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{
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msr_check_and_clear(MSR_FP);
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}
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#else
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static inline void save_fpu(struct task_struct *t) { }
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static inline void flush_fp_to_thread(struct task_struct *t) { }
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#endif
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#ifdef CONFIG_ALTIVEC
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extern void enable_kernel_altivec(void);
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extern void flush_altivec_to_thread(struct task_struct *);
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extern void giveup_altivec(struct task_struct *);
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extern void save_altivec(struct task_struct *);
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static inline void disable_kernel_altivec(void)
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{
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msr_check_and_clear(MSR_VEC);
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}
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#else
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static inline void save_altivec(struct task_struct *t) { }
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static inline void __giveup_altivec(struct task_struct *t) { }
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static inline void enable_kernel_altivec(void)
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{
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BUILD_BUG();
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}
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static inline void disable_kernel_altivec(void)
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{
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BUILD_BUG();
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}
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#endif
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#ifdef CONFIG_VSX
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extern void enable_kernel_vsx(void);
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extern void flush_vsx_to_thread(struct task_struct *);
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static inline void disable_kernel_vsx(void)
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{
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msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
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}
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#else
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static inline void enable_kernel_vsx(void)
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{
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BUILD_BUG();
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}
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static inline void disable_kernel_vsx(void)
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{
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BUILD_BUG();
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}
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#endif
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#ifdef CONFIG_SPE
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extern void enable_kernel_spe(void);
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extern void flush_spe_to_thread(struct task_struct *);
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extern void giveup_spe(struct task_struct *);
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extern void __giveup_spe(struct task_struct *);
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static inline void disable_kernel_spe(void)
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{
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msr_check_and_clear(MSR_SPE);
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}
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#else
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static inline void __giveup_spe(struct task_struct *t) { }
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#endif
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static inline void clear_task_ebb(struct task_struct *t)
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{
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#ifdef CONFIG_PPC_BOOK3S_64
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/* EBB perf events are not inherited, so clear all EBB state. */
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t->thread.ebbrr = 0;
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t->thread.ebbhr = 0;
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t->thread.bescr = 0;
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t->thread.mmcr2 = 0;
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t->thread.mmcr0 = 0;
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t->thread.siar = 0;
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t->thread.sdar = 0;
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t->thread.sier = 0;
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t->thread.used_ebb = 0;
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#endif
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}
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void kvmppc_save_user_regs(void);
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void kvmppc_save_current_sprs(void);
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extern int set_thread_tidr(struct task_struct *t);
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#endif /* _ASM_POWERPC_SWITCH_TO_H */
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