Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / include / asm-arm26 / tlb.h

diff --git a/include/asm-arm26/tlb.h b/include/asm-arm26/tlb.h
index acfdbe8..d730584 100644 (file)
--- a/include/asm-arm26/tlb.h
+++ b/include/asm-arm26/tlb.h
@@ -3,6 +3,7 @@
 
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
+#include <linux/vs_memory.h>
 
 /*
  * TLB handling.  This allows us to remove pages from the page
@@ -10,22 +11,20 @@
  */
 struct mmu_gather {
         struct mm_struct        *mm;
-        unsigned int            freed;
-
-        unsigned int            flushes;
-        unsigned int            avoided_flushes;
+        unsigned int            need_flush;
+        unsigned int            fullmm;
 };
 
-extern struct mmu_gather mmu_gathers[NR_CPUS];
+DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
 
 static inline struct mmu_gather *
 tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
 {
-        int cpu = smp_processor_id();
-        struct mmu_gather *tlb = &mmu_gathers[cpu];
+        struct mmu_gather *tlb = &get_cpu_var(mmu_gathers);
 
         tlb->mm = mm;
-        tlb->freed = 0;
+        tlb->need_flush = 0;
+        tlb->fullmm = full_mm_flush;
 
         return tlb;
 }
@@ -33,31 +32,32 @@ tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
 static inline void
 tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
 {
-        struct mm_struct *mm = tlb->mm;
-        unsigned long freed = tlb->freed;
-        int rss = mm->rss;
-
-        if (rss < freed)
-                freed = rss;
-       // mm->rss = rss - freed;
-       vx_rsspages_sub(mm, freed);
-
-        if (freed) {
-                flush_tlb_mm(mm);
-                tlb->flushes++;
-        } else {
-                tlb->avoided_flushes++;
-        }
+        if (tlb->need_flush)
+                flush_tlb_mm(tlb->mm);
 
         /* keep the page table cache within bounds */
         check_pgt_cache();
+
+        put_cpu_var(mmu_gathers);
 }
 
 #define tlb_remove_tlb_entry(tlb,ptep,address)  do { } while (0)
-#define tlb_start_vma(tlb,vma)                  do { } while (0)
+//#define tlb_start_vma(tlb,vma)                  do { } while (0)
+//FIXME - ARM32 uses this now that things changed in the kernel. seems like it may be pointless on arm26, however to get things compiling...
+#define tlb_start_vma(tlb,vma)                                          \
+        do {                                                            \
+                if (!tlb->fullmm)                                       \
+                        flush_cache_range(vma, vma->vm_start, vma->vm_end); \
+        } while (0)
 #define tlb_end_vma(tlb,vma)                    do { } while (0)
 
-#define tlb_remove_page(tlb,page)       free_page_and_swap_cache(page)
+static inline void
+tlb_remove_page(struct mmu_gather *tlb, struct page *page)
+{
+        tlb->need_flush = 1;
+        free_page_and_swap_cache(page);
+}
+
 #define pte_free_tlb(tlb,ptep)          pte_free(ptep)
 #define pmd_free_tlb(tlb,pmdp)          pmd_free(pmdp)