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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /arch/arm64/mm/flush.c
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'arch/arm64/mm/flush.c')
-rw-r--r--arch/arm64/mm/flush.c49
1 files changed, 18 insertions, 31 deletions
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index c26b80401..60585bde1 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -34,19 +34,24 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
__flush_icache_all();
}
+static void sync_icache_aliases(void *kaddr, unsigned long len)
+{
+ unsigned long addr = (unsigned long)kaddr;
+
+ if (icache_is_aliasing()) {
+ __clean_dcache_area_pou(kaddr, len);
+ __flush_icache_all();
+ } else {
+ flush_icache_range(addr, addr + len);
+ }
+}
+
static void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
unsigned long uaddr, void *kaddr,
unsigned long len)
{
- if (vma->vm_flags & VM_EXEC) {
- unsigned long addr = (unsigned long)kaddr;
- if (icache_is_aliasing()) {
- __flush_dcache_area(kaddr, len);
- __flush_icache_all();
- } else {
- flush_icache_range(addr, addr + len);
- }
- }
+ if (vma->vm_flags & VM_EXEC)
+ sync_icache_aliases(kaddr, len);
}
/*
@@ -74,13 +79,11 @@ void __sync_icache_dcache(pte_t pte, unsigned long addr)
if (!page_mapping(page))
return;
- if (!test_and_set_bit(PG_dcache_clean, &page->flags)) {
- __flush_dcache_area(page_address(page),
- PAGE_SIZE << compound_order(page));
+ if (!test_and_set_bit(PG_dcache_clean, &page->flags))
+ sync_icache_aliases(page_address(page),
+ PAGE_SIZE << compound_order(page));
+ else if (icache_is_aivivt())
__flush_icache_all();
- } else if (icache_is_aivivt()) {
- __flush_icache_all();
- }
}
/*
@@ -99,19 +102,3 @@ EXPORT_SYMBOL(flush_dcache_page);
* Additional functions defined in assembly.
*/
EXPORT_SYMBOL(flush_icache_range);
-
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
-void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
- pmd_t *pmdp)
-{
- pmd_t pmd = pmd_mksplitting(*pmdp);
-
- VM_BUG_ON(address & ~PMD_MASK);
- set_pmd_at(vma->vm_mm, address, pmdp, pmd);
-
- /* dummy IPI to serialise against fast_gup */
- kick_all_cpus_sync();
-}
-#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */