[Qemu-devel] [PATCH v2] exec.c: Use tb1->phys_hash_next directly in tb_remove

[Wei-Ren Chen]

  When tb_remove was first commited at fd6ce8f6, there were three different
calls pass different names to offsetof. In current codebase, the other two
calls are replaced with tb_page_remove. There is no need to have a general
tb_remove. Omit passing the third parameter and using tb1->phys_hash_next
directly.

Signed-off-by: Chen Wei-Ren <che...@iis.sinica.edu.tw>
---

v2: Address Peter's comment.
    - place comment used belong tb_remove above tb_phys_invalidate.
    - remove unnecessary bracket.

 exec.c |   12 +++++-------
 1 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/exec.c b/exec.c
index 8435de0..6343838 100644
--- a/exec.c
+++ b/exec.c
@@ -862,18 +862,16 @@ static void tb_page_check(void)
 
 #endif
 
-/* invalidate one TB */
-static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb,
-                             int next_offset)
+static inline void tb_hash_remove(TranslationBlock **ptb, TranslationBlock *tb)
 {
     TranslationBlock *tb1;
     for(;;) {
         tb1 = *ptb;
         if (tb1 == tb) {
-            *ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
+            *ptb = tb1->phys_hash_next;
             break;
         }
-        ptb = (TranslationBlock **)((char *)tb1 + next_offset);
+        ptb = &tb1->phys_hash_next;
     }
 }
 
@@ -929,6 +927,7 @@ static inline void tb_reset_jump(TranslationBlock *tb, int 
n)
     tb_set_jmp_target(tb, n, (uintptr_t)(tb->tc_ptr + tb->tb_next_offset[n]));
 }
 
+/* invalidate one TB */
 void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
 {
     CPUArchState *env;
@@ -940,8 +939,7 @@ void tb_phys_invalidate(TranslationBlock *tb, 
tb_page_addr_t page_addr)
     /* remove the TB from the hash list */
     phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
     h = tb_phys_hash_func(phys_pc);
-    tb_remove(&tb_phys_hash[h], tb,
-              offsetof(TranslationBlock, phys_hash_next));
+    tb_hash_remove(&tb_phys_hash[h], tb);
 
     /* remove the TB from the page list */
     if (tb->page_addr[0] != page_addr) {
-- 
1.7.3.4


-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj