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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-12-11 12:09:03 +0000
committerSteven Rostedt <rostedt@goodmis.org>2015-12-16 09:28:23 -0500
commitdd39a26538e37f6c6131e829a4a510787e43c783 (patch)
tree9803a42e2db54046bf428f6aff607b6256f53f51 /scripts
parentLinux 4.4-rc5 (diff)
downloadlinux-dev-dd39a26538e37f6c6131e829a4a510787e43c783.tar.xz
linux-dev-dd39a26538e37f6c6131e829a4a510787e43c783.zip
scripts: recordmcount: break hardlinks
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>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/recordmcount.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index 698768bdc581..91705ef30402 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -211,6 +211,20 @@ 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;
}