[Xen-changelog] [xen master] libxl: events: Deregister, don't just modify, sigchld pipe fd

[patchbot@xxxxxxx]

commit 4b9143e4a447789fab45162edd9cbf00512b88a9
Author:     Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
AuthorDate: Thu Nov 27 18:03:03 2014 +0000
Commit:     Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CommitDate: Wed Dec 10 13:48:31 2014 +0000

    libxl: events: Deregister, don't just modify, sigchld pipe fd
    
    We want to have no fd events registered when we are idle.  This
    implies that we must be able to deregister our interest in the sigchld
    self-pipe fd, not just modify to request no events.
    
    Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Tested-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Release-Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 tools/libxl/libxl_fork.c |    9 +--------
 1 files changed, 1 insertions(+), 8 deletions(-)

diff --git a/tools/libxl/libxl_fork.c b/tools/libxl/libxl_fork.c
index fa15095..144208a 100644
--- a/tools/libxl/libxl_fork.c
+++ b/tools/libxl/libxl_fork.c
@@ -372,15 +372,8 @@ static void sigchld_user_remove(libxl_ctx *ctx) /* 
idempotent */
 
 void libxl__sigchld_notneeded(libxl__gc *gc) /* non-reentrant, idempotent */
 {
-    int rc;
-
     sigchld_user_remove(CTX);
-
-    if (libxl__ev_fd_isregistered(&CTX->sigchld_selfpipe_efd)) {
-        rc = libxl__ev_fd_modify(gc, &CTX->sigchld_selfpipe_efd, 0);
-        if (rc)
-            libxl__ev_fd_deregister(gc, &CTX->sigchld_selfpipe_efd);
-    }
+    libxl__ev_fd_deregister(gc, &CTX->sigchld_selfpipe_efd);
 }
 
 int libxl__sigchld_needed(libxl__gc *gc) /* non-reentrant, idempotent */
--
generated by git-patchbot for /home/xen/git/xen.git#master

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