From: Sergey Fedorov <serge.f...@gmail.com>
Unify the code of this function with tb_jmp_remove_from_list(). Making
these functions similar improves their readability. Also this could be a
step towards making this function thread-safe.
Signed-off-by: Sergey Fedorov <serge.f...@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedo...@linaro.org>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
---
Changes in v2:
* Tweaked a comment to better describe jmp_list_{next|first} usage
* Eliminated duplicate dereference of 'ptb' in tb_jmp_unlink()
translate-all.c | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)
diff --git a/translate-all.c b/translate-all.c
index ce609778c810..b09774b1768b 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -964,25 +964,22 @@ static inline void tb_reset_jump(TranslationBlock *tb,
int n)
/* remove any jumps to the TB */
static inline void tb_jmp_unlink(TranslationBlock *tb)
{
- uintptr_t tb1, tb2;
+ TranslationBlock *tb1;
+ uintptr_t *ptb, ntb;
unsigned int n1;
- tb1 = tb->jmp_list_first;
+ ptb = &tb->jmp_list_first;
for (;;) {
- TranslationBlock *tmp_tb;
- n1 = tb1 & 3;
+ ntb = *ptb;
+ n1 = ntb & 3;
+ tb1 = (TranslationBlock *)(ntb & ~3);
if (n1 == 2) {
break;
}
- tmp_tb = (TranslationBlock *)(tb1 & ~3);
- tb2 = tmp_tb->jmp_list_next[n1];
- tb_reset_jump(tmp_tb, n1);
- tmp_tb->jmp_list_next[n1] = (uintptr_t)NULL;
- tb1 = tb2;
+ tb_reset_jump(tb1, n1);
+ *ptb = tb1->jmp_list_next[n1];
+ tb1->jmp_list_next[n1] = (uintptr_t)NULL;
}
-
- assert(((uintptr_t)tb & 3) == 0);
- tb->jmp_list_first = (uintptr_t)tb | 2; /* fail safe */
}
/* invalidate one TB */
--
2.8.1
