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parisc: Remove flush_user_dcache_range and flush_user_icache_range 

The functions flush_user_dcache_range() and flush_user_icache_range()
are only used by the parisc signal handling code.  This code only needs
to flush a couple of lines, so the threshold check is unnecessary
overhead.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2017-02-20 14:02:46 -05:00 committed by Helge Deller
parent 8351badf34
commit ef470a60e1
3 changed files with 7 additions and 26 deletions
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2
arch/parisc/include/asm/cacheflush.h
View File

@ -27,8 +27,6 @@ void flush_user_dcache_range_asm(unsigned long, unsigned long);
void flush_kernel_dcache_range_asm(unsigned long, unsigned long); void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
void flush_kernel_dcache_page_asm(void *); void flush_kernel_dcache_page_asm(void *);
void flush_kernel_icache_page(void *); void flush_kernel_icache_page(void *);
void flush_user_dcache_range(unsigned long, unsigned long);
void flush_user_icache_range(unsigned long, unsigned long);
/* Cache flush operations */ /* Cache flush operations */

18
arch/parisc/kernel/cache.c
View File

@ -573,24 +573,6 @@ void flush_cache_mm(struct mm_struct *mm)
} }
} }
void
flush_user_dcache_range(unsigned long start, unsigned long end)
{
if ((end - start) < parisc_cache_flush_threshold)
flush_user_dcache_range_asm(start,end);
else
flush_data_cache();
}
void
flush_user_icache_range(unsigned long start, unsigned long end)
{
if ((end - start) < parisc_cache_flush_threshold)
flush_user_icache_range_asm(start,end);
else
flush_instruction_cache();
}
void flush_cache_range(struct vm_area_struct *vma, void flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end) unsigned long start, unsigned long end)
{ {

13
arch/parisc/kernel/signal.c
View File

@ -232,6 +232,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
struct rt_sigframe __user *frame; struct rt_sigframe __user *frame;
unsigned long rp, usp; unsigned long rp, usp;
unsigned long haddr, sigframe_size; unsigned long haddr, sigframe_size;
unsigned long start, end;
int err = 0; int err = 0;
#ifdef CONFIG_64BIT #ifdef CONFIG_64BIT
struct compat_rt_sigframe __user * compat_frame; struct compat_rt_sigframe __user * compat_frame;
@ -299,10 +300,10 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
} }
#endif #endif
flush_user_dcache_range((unsigned long) &frame->tramp[0], start = (unsigned long) &frame->tramp[0];
(unsigned long) &frame->tramp[TRAMP_SIZE]); end = (unsigned long) &frame->tramp[TRAMP_SIZE];
flush_user_icache_range((unsigned long) &frame->tramp[0], flush_user_dcache_range_asm(start, end);
(unsigned long) &frame->tramp[TRAMP_SIZE]); flush_user_icache_range_asm(start, end);
/* TRAMP Words 0-4, Length 5 = SIGRESTARTBLOCK_TRAMP /* TRAMP Words 0-4, Length 5 = SIGRESTARTBLOCK_TRAMP
* TRAMP Words 5-9, Length 4 = SIGRETURN_TRAMP * TRAMP Words 5-9, Length 4 = SIGRETURN_TRAMP
@ -548,8 +549,8 @@ insert_restart_trampoline(struct pt_regs *regs)
WARN_ON(err); WARN_ON(err);
/* flush data/instruction cache for new insns */ /* flush data/instruction cache for new insns */
flush_user_dcache_range(start, end); flush_user_dcache_range_asm(start, end);
flush_user_icache_range(start, end); flush_user_icache_range_asm(start, end);
regs->gr[31] = regs->gr[30] + 8; regs->gr[31] = regs->gr[30] + 8;
return; return;