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powerpc: Remove the empty giveup_fpu() function on 32bit kernel

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Instead of implementing an empty giveup_fpu() function for each
32bit processor type, replace them with an unique empty inline
function.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Kevin Hao 2013-07-14 17:02:06 +08:00 committed by Benjamin Herrenschmidt
parent 037f0eed57
commit 5f20be4478
6 changed files with 4 additions and 33 deletions
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3
arch/powerpc/include/asm/switch_to.h
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@ -16,7 +16,6 @@ struct thread_struct;
extern struct task_struct *_switch(struct thread_struct *prev, extern struct task_struct *_switch(struct thread_struct *prev,
struct thread_struct *next); struct thread_struct *next);
extern void giveup_fpu(struct task_struct *);
extern void load_up_fpu(void); extern void load_up_fpu(void);
extern void enable_kernel_fp(void); extern void enable_kernel_fp(void);
extern void enable_kernel_altivec(void); extern void enable_kernel_altivec(void);
@ -38,8 +37,10 @@ static inline void discard_lazy_cpu_state(void)
#ifdef CONFIG_PPC_FPU #ifdef CONFIG_PPC_FPU
extern void flush_fp_to_thread(struct task_struct *); extern void flush_fp_to_thread(struct task_struct *);
extern void giveup_fpu(struct task_struct *);
#else #else
static inline void flush_fp_to_thread(struct task_struct *t) { } static inline void flush_fp_to_thread(struct task_struct *t) { }
static inline void giveup_fpu(struct task_struct *t) { }
#endif #endif
#ifdef CONFIG_ALTIVEC #ifdef CONFIG_ALTIVEC

8
arch/powerpc/kernel/head_40x.S
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@ -822,14 +822,6 @@ finish_tlb_load:
rfi /* Should sync shadow TLBs */ rfi /* Should sync shadow TLBs */
b . /* prevent prefetch past rfi */ b . /* prevent prefetch past rfi */
/* extern void giveup_fpu(struct task_struct *prev)
*
* The PowerPC 4xx family of processors do not have an FPU, so this just
* returns.
*/
_ENTRY(giveup_fpu)
blr
/* This is where the main kernel code starts. /* This is where the main kernel code starts.
*/ */
start_here: start_here:

10
arch/powerpc/kernel/head_44x.S
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@ -784,16 +784,6 @@ _GLOBAL(__fixup_440A_mcheck)
sync sync
blr blr
/*
* extern void giveup_fpu(struct task_struct *prev)
*
* The 44x core does not have an FPU.
*/
#ifndef CONFIG_PPC_FPU
_GLOBAL(giveup_fpu)
blr
#endif
_GLOBAL(set_context) _GLOBAL(set_context)
#ifdef CONFIG_BDI_SWITCH #ifdef CONFIG_BDI_SWITCH

4
arch/powerpc/kernel/head_8xx.S
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@ -691,10 +691,6 @@ modified_instr:
b 151b b 151b
#endif #endif
.globl giveup_fpu
giveup_fpu:
blr
/* /*
* This is where the main kernel code starts. * This is where the main kernel code starts.
*/ */

10
arch/powerpc/kernel/head_fsl_booke.S
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@ -947,16 +947,6 @@ _GLOBAL(giveup_spe)
blr blr
#endif /* CONFIG_SPE */ #endif /* CONFIG_SPE */
/*
* extern void giveup_fpu(struct task_struct *prev)
*
* Not all FSL Book-E cores have an FPU
*/
#ifndef CONFIG_PPC_FPU
_GLOBAL(giveup_fpu)
blr
#endif
/* /*
* extern void abort(void) * extern void abort(void)
* *

2
arch/powerpc/kernel/ppc_ksyms.c
View File

@ -96,7 +96,9 @@ EXPORT_SYMBOL(pci_dram_offset);
EXPORT_SYMBOL(start_thread); EXPORT_SYMBOL(start_thread);
#ifdef CONFIG_PPC_FPU
EXPORT_SYMBOL(giveup_fpu); EXPORT_SYMBOL(giveup_fpu);
#endif
#ifdef CONFIG_ALTIVEC #ifdef CONFIG_ALTIVEC
EXPORT_SYMBOL(giveup_altivec); EXPORT_SYMBOL(giveup_altivec);
#endif /* CONFIG_ALTIVEC */ #endif /* CONFIG_ALTIVEC */