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[Qemu-devel] [PATCH] linux-user/sparc/signal.c: Remove unnecessary comme


From: Peter Maydell
Subject: [Qemu-devel] [PATCH] linux-user/sparc/signal.c: Remove unnecessary comment
Date: Tue, 9 Oct 2018 19:40:17 +0100

Remove a comment suggesting that we need to call tb_flush()
after writing the SPARC signal frame trampoline insns.
This isn't necessary in QEMU, because (even if the guest
architecture requires explicit icache maintenance) we
ensure that memory writes result in invalidation of
translated code from that memory.

Signed-off-by: Peter Maydell <address@hidden>
---
Found (with grep) while looking at what parts of the tree call
tb_flush()...

 linux-user/sparc/signal.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c
index b4c60aa4468..e44e99993c6 100644
--- a/linux-user/sparc/signal.c
+++ b/linux-user/sparc/signal.c
@@ -258,10 +258,6 @@ void setup_frame(int sig, struct target_sigaction *ka,
         __put_user(val32, &sf->insns[1]);
         if (err)
             goto sigsegv;
-
-        /* Flush instruction space. */
-        // flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
-        // tb_flush(env);
     }
     unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
     return;
-- 
2.19.0




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