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qht: return existing entry when qht_insert fails

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The meaning of "existing" is now changed to "matches in hash and
ht->cmp result". This is saner than just checking the pointer value.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by:  Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Emilio G. Cota 2017-07-11 18:48:21 -04:00 • committed by Richard Henderson
parent 61b8cef1d4
commit 32359d529f
5 changed files with 32 additions and 16 deletions
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2
accel/tcg/translate-all.c
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@ -1242,7 +1242,7 @@ static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc,
/* add in the hash table */
h = tb_hash_func(phys_pc, tb->pc, tb->flags, tb->cflags & CF_HASH_MASK,
tb->trace_vcpu_dstate);
qht_insert(&tb_ctx.htable, tb, h);
qht_insert(&tb_ctx.htable, tb, h, NULL);
#ifdef CONFIG_USER_ONLY
if (DEBUG_TB_CHECK_GATE) {