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authorPaul Burton <paul.burton@mips.com>2019-02-07 19:07:04 +0000
committerPaul Burton <paul.burton@mips.com>2019-02-07 12:59:45 -0800
commit3315b6b336c88969547f7e9f2e105a815eea529a (patch)
tree811d822af9c1fa64ed7ba432a612d55631f95502 /arch/mips
parentMIPS: Fix set_pte() for Netlogic XLR using cmpxchg64() (diff)
downloadlinux-dev-3315b6b336c88969547f7e9f2e105a815eea529a.tar.xz
linux-dev-3315b6b336c88969547f7e9f2e105a815eea529a.zip
MIPS: Delete unused flush_cache_sigtramp()
Commit adcc81f148d7 ("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
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/cacheflush.h2
-rw-r--r--arch/mips/mm/c-octeon.c18
-rw-r--r--arch/mips/mm/c-r3k.c25
-rw-r--r--arch/mips/mm/c-r4k.c116
-rw-r--r--arch/mips/mm/c-tx39.c21
-rw-r--r--arch/mips/mm/cache.c1
6 files changed, 0 insertions, 183 deletions
diff --git a/arch/mips/include/asm/cacheflush.h b/arch/mips/include/asm/cacheflush.h
index 4812d1fed0c2..d687b40b9fbb 100644
--- a/arch/mips/include/asm/cacheflush.h
+++ b/arch/mips/include/asm/cacheflush.h
@@ -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);
diff --git a/arch/mips/mm/c-octeon.c b/arch/mips/mm/c-octeon.c
index 0e45b061e514..8064821e9805 100644
--- a/arch/mips/mm/c-octeon.c
+++ b/arch/mips/mm/c-octeon.c
@@ -128,23 +128,6 @@ 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
*
* @vma: VMA to flush
@@ -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;
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c
index 01848cdf2074..0ca401ddf3b7 100644
--- a/arch/mips/mm/c-r3k.c
+++ b/arch/mips/mm/c-r3k.c
@@ -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;
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index cc4e17caeb26..5166e38cd1c6 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -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;
diff --git a/arch/mips/mm/c-tx39.c b/arch/mips/mm/c-tx39.c
index 5f6c099a9457..b7c8a9d79c35 100644
--- a/arch/mips/mm/c-tx39.c
+++ b/arch/mips/mm/c-tx39.c
@@ -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;
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 55099fbff4e6..3da216988672 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -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);