This is a note to let you know that I've just added the patch titled
scripts: recordmcount: break hardlinks
to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: scripts-recordmcount-break-hardlinks.patch and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From dd39a26538e37f6c6131e829a4a510787e43c783 Mon Sep 17 00:00:00 2001
From: Russell King rmk+kernel@arm.linux.org.uk Date: Fri, 11 Dec 2015 12:09:03 +0000 Subject: scripts: recordmcount: break hardlinks
From: Russell King rmk+kernel@arm.linux.org.uk
commit dd39a26538e37f6c6131e829a4a510787e43c783 upstream.
recordmcount edits the file in-place, which can cause problems when using ccache in hardlink mode. Arrange for recordmcount to break a hardlinked object.
Link: http://lkml.kernel.org/r/E1a7MVT-0000et-62@rmk-PC.arm.linux.org.uk
Cc: stable@vger.kernel.org # 2.6.37+ Signed-off-by: Russell King rmk+kernel@arm.linux.org.uk Signed-off-by: Steven Rostedt rostedt@goodmis.org Cc: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- scripts/recordmcount.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
--- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -201,6 +201,20 @@ static void *mmap_file(char const *fname addr = umalloc(sb.st_size); uread(fd_map, addr, sb.st_size); } + if (sb.st_nlink != 1) { + /* file is hard-linked, break the hard link */ + close(fd_map); + if (unlink(fname) < 0) { + perror(fname); + fail_file(); + } + fd_map = open(fname, O_RDWR | O_CREAT, sb.st_mode); + if (fd_map < 0) { + perror(fname); + fail_file(); + } + uwrite(fd_map, addr, sb.st_size); + } return addr; }
Patches currently in stable-queue which might be from rmk+kernel@arm.linux.org.uk are
queue-3.18/scripts-recordmcount-break-hardlinks.patch