From: Russell King <rmk+ker...@arm.linux.org.uk> 3.4.113-rc1 review patch. If anyone has any objections, please let me know.
------------------ 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...@rmk-pc.arm.linux.org.uk Signed-off-by: Russell King <rmk+ker...@arm.linux.org.uk> Signed-off-by: Steven Rostedt <rost...@goodmis.org> Signed-off-by: Zefan Li <lize...@huawei.com> --- scripts/recordmcount.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index ee52cb8..4eb047a 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -182,6 +182,20 @@ 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; } -- 1.9.1
