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MIPS: Delete unused flush_cache_sigtramp() 

Commit adcc81f148 ("MIPS: math-emu: Write-protect delay slot emulation
pages") left flush_cache_sigtramp() unused. Delete the dead code.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: linux-mips@vger.kernel.org
This commit is contained in:
Paul Burton 2019-02-07 19:07:04 +00:00
parent c7e2d71dda
commit 3315b6b336
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
6 changed files with 0 additions and 183 deletions
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2
arch/mips/include/asm/cacheflush.h
View File

@ -25,7 +25,6 @@
*
* MIPS specific flush operations:
*
* - flush_cache_sigtramp() flush signal trampoline
* - flush_icache_all() flush the entire instruction cache
* - flush_data_cache_page() flushes a page from the data cache
* - __flush_icache_user_range(start, end) flushes range of user instructions
@ -110,7 +109,6 @@ extern void copy_from_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr, void *dst, const void *src,
unsigned long len);
extern void (*flush_cache_sigtramp)(unsigned long addr);
extern void (*flush_icache_all)(void);
extern void (*local_flush_data_cache_page)(void * addr);
extern void (*flush_data_cache_page)(unsigned long addr);

18
arch/mips/mm/c-octeon.c
View File

@ -127,23 +127,6 @@ static void octeon_flush_icache_range(unsigned long start, unsigned long end)
}
/**
* Flush the icache for a trampoline. These are used for interrupt
* and exception hooking.
*
* @addr: Address to flush
*/
static void octeon_flush_cache_sigtramp(unsigned long addr)
{
struct vm_area_struct *vma;
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, addr);
octeon_flush_icache_all_cores(vma);
up_read(&current->mm->mmap_sem);
}
/**
* Flush a range out of a vma
*
@ -289,7 +272,6 @@ void octeon_cache_init(void)
flush_cache_mm = octeon_flush_cache_mm;
flush_cache_page = octeon_flush_cache_page;
flush_cache_range = octeon_flush_cache_range;
flush_cache_sigtramp = octeon_flush_cache_sigtramp;
flush_icache_all = octeon_flush_icache_all;
flush_data_cache_page = octeon_flush_data_cache_page;
flush_icache_range = octeon_flush_icache_range;

25
arch/mips/mm/c-r3k.c
View File

@ -274,30 +274,6 @@ static void r3k_flush_data_cache_page(unsigned long addr)
{
}
static void r3k_flush_cache_sigtramp(unsigned long addr)
{
unsigned long flags;
pr_debug("csigtramp[%08lx]\n", addr);
flags = read_c0_status();
write_c0_status(flags&~ST0_IEC);
/* Fill the TLB to avoid an exception with caches isolated. */
asm( "lw\t$0, 0x000(%0)\n\t"
"lw\t$0, 0x004(%0)\n\t"
: : "r" (addr) );
write_c0_status((ST0_ISC|ST0_SWC|flags)&~ST0_IEC);
asm( "sb\t$0, 0x000(%0)\n\t"
"sb\t$0, 0x004(%0)\n\t"
: : "r" (addr) );
write_c0_status(flags);
}
static void r3k_flush_kernel_vmap_range(unsigned long vaddr, int size)
{
BUG();
@ -331,7 +307,6 @@ void r3k_cache_init(void)
__flush_kernel_vmap_range = r3k_flush_kernel_vmap_range;
flush_cache_sigtramp = r3k_flush_cache_sigtramp;
local_flush_data_cache_page = local_r3k_flush_data_cache_page;
flush_data_cache_page = r3k_flush_data_cache_page;

116
arch/mips/mm/c-r4k.c
View File

@ -937,119 +937,6 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
}
#endif /* CONFIG_DMA_NONCOHERENT */
struct flush_cache_sigtramp_args {
struct mm_struct *mm;
struct page *page;
unsigned long addr;
};
/*
* While we're protected against bad userland addresses we don't care
* very much about what happens in that case. Usually a segmentation
* fault will dump the process later on anyway ...
*/
static void local_r4k_flush_cache_sigtramp(void *args)
{
struct flush_cache_sigtramp_args *fcs_args = args;
unsigned long addr = fcs_args->addr;
struct page *page = fcs_args->page;
struct mm_struct *mm = fcs_args->mm;
int map_coherent = 0;
void *vaddr;
unsigned long ic_lsize = cpu_icache_line_size();
unsigned long dc_lsize = cpu_dcache_line_size();
unsigned long sc_lsize = cpu_scache_line_size();
/*
* If owns no valid ASID yet, cannot possibly have gotten
* this page into the cache.
*/
if (!has_valid_asid(mm, R4K_HIT))
return;
if (mm == current->active_mm) {
vaddr = NULL;
} else {
/*
* Use kmap_coherent or kmap_atomic to do flushes for
* another ASID than the current one.
*/
map_coherent = (cpu_has_dc_aliases &&
page_mapcount(page) &&
!Page_dcache_dirty(page));
if (map_coherent)
vaddr = kmap_coherent(page, addr);
else
vaddr = kmap_atomic(page);
addr = (unsigned long)vaddr + (addr & ~PAGE_MASK);
}
R4600_HIT_CACHEOP_WAR_IMPL;
if (!cpu_has_ic_fills_f_dc) {
if (dc_lsize)
vaddr ? flush_dcache_line(addr & ~(dc_lsize - 1))
: protected_writeback_dcache_line(
addr & ~(dc_lsize - 1));
if (!cpu_icache_snoops_remote_store && scache_size)
vaddr ? flush_scache_line(addr & ~(sc_lsize - 1))
: protected_writeback_scache_line(
addr & ~(sc_lsize - 1));
}
if (ic_lsize)
vaddr ? flush_icache_line(addr & ~(ic_lsize - 1))
: protected_flush_icache_line(addr & ~(ic_lsize - 1));
if (vaddr) {
if (map_coherent)
kunmap_coherent();
else
kunmap_atomic(vaddr);
}
if (MIPS4K_ICACHE_REFILL_WAR) {
__asm__ __volatile__ (
".set push\n\t"
".set noat\n\t"
".set "MIPS_ISA_LEVEL"\n\t"
#ifdef CONFIG_32BIT
"la $at,1f\n\t"
#endif
#ifdef CONFIG_64BIT
"dla $at,1f\n\t"
#endif
"cache %0,($at)\n\t"
"nop; nop; nop\n"
"1:\n\t"
".set pop"
:
: "i" (Hit_Invalidate_I));
}
if (MIPS_CACHE_SYNC_WAR)
__asm__ __volatile__ ("sync");
}
static void r4k_flush_cache_sigtramp(unsigned long addr)
{
struct flush_cache_sigtramp_args args;
int npages;
down_read(&current->mm->mmap_sem);
npages = get_user_pages_fast(addr, 1, 0, &args.page);
if (npages < 1)
goto out;
args.mm = current->mm;
args.addr = addr;
r4k_on_each_cpu(R4K_HIT, local_r4k_flush_cache_sigtramp, &args);
put_page(args.page);
out:
up_read(&current->mm->mmap_sem);
}
static void r4k_flush_icache_all(void)
{
if (cpu_has_vtag_icache)
@ -1978,7 +1865,6 @@ void r4k_cache_init(void)
__flush_kernel_vmap_range = r4k_flush_kernel_vmap_range;
flush_cache_sigtramp = r4k_flush_cache_sigtramp;
flush_icache_all = r4k_flush_icache_all;
local_flush_data_cache_page = local_r4k_flush_data_cache_page;
flush_data_cache_page = r4k_flush_data_cache_page;
@ -2033,7 +1919,6 @@ void r4k_cache_init(void)
/* I$ fills from D$ just by emptying the write buffers */
flush_cache_page = (void *)b5k_instruction_hazard;
flush_cache_range = (void *)b5k_instruction_hazard;
flush_cache_sigtramp = (void *)b5k_instruction_hazard;
local_flush_data_cache_page = (void *)b5k_instruction_hazard;
flush_data_cache_page = (void *)b5k_instruction_hazard;
flush_icache_range = (void *)b5k_instruction_hazard;
@ -2052,7 +1937,6 @@ void r4k_cache_init(void)
flush_cache_mm = (void *)cache_noop;
flush_cache_page = (void *)cache_noop;
flush_cache_range = (void *)cache_noop;
flush_cache_sigtramp = (void *)cache_noop;
flush_icache_all = (void *)cache_noop;
flush_data_cache_page = (void *)cache_noop;
local_flush_data_cache_page = (void *)cache_noop;

21
arch/mips/mm/c-tx39.c
View File

@ -290,25 +290,6 @@ static void tx39_dma_cache_inv(unsigned long addr, unsigned long size)
}
}
static void tx39_flush_cache_sigtramp(unsigned long addr)
{
unsigned long ic_lsize = current_cpu_data.icache.linesz;
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
unsigned long config;
unsigned long flags;
protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
/* disable icache (set ICE#) */
local_irq_save(flags);
config = read_c0_conf();
write_c0_conf(config & ~TX39_CONF_ICE);
TX39_STOP_STREAMING();
protected_flush_icache_line(addr & ~(ic_lsize - 1));
write_c0_conf(config);
local_irq_restore(flags);
}
static __init void tx39_probe_cache(void)
{
unsigned long config;
@ -368,7 +349,6 @@ void tx39_cache_init(void)
flush_icache_range = (void *) tx39h_flush_icache_all;
local_flush_icache_range = (void *) tx39h_flush_icache_all;
flush_cache_sigtramp = (void *) tx39h_flush_icache_all;
local_flush_data_cache_page = (void *) tx39h_flush_icache_all;
flush_data_cache_page = (void *) tx39h_flush_icache_all;
@ -397,7 +377,6 @@ void tx39_cache_init(void)
__flush_kernel_vmap_range = tx39_flush_kernel_vmap_range;
flush_cache_sigtramp = tx39_flush_cache_sigtramp;
local_flush_data_cache_page = local_tx39_flush_data_cache_page;
flush_data_cache_page = tx39_flush_data_cache_page;

1
arch/mips/mm/cache.c
View File

@ -47,7 +47,6 @@ void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range);
/* MIPS specific cache operations */
void (*flush_cache_sigtramp)(unsigned long addr);
void (*local_flush_data_cache_page)(void * addr);
void (*flush_data_cache_page)(unsigned long addr);
void (*flush_icache_all)(void);