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author | Russell King | 2015-12-11 06:09:03 -0600 |
---|---|---|
committer | Greg Kroah-Hartman | 2016-03-03 17:06:50 -0600 |
commit | b11202ea8547258205ef1ea15c61c7dd50d65989 (patch) | |
tree | a31d305812db2a7eed2b5e5e075a2281b1b7da85 | |
parent | c1a968eced547b68eb6a584b4808fb5990c7eaa7 (diff) | |
download | kernel-video-b11202ea8547258205ef1ea15c61c7dd50d65989.tar.gz kernel-video-b11202ea8547258205ef1ea15c61c7dd50d65989.tar.xz kernel-video-b11202ea8547258205ef1ea15c61c7dd50d65989.zip |
scripts: recordmcount: break hardlinks
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
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | scripts/recordmcount.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index 9c22317778e..ee625e3a56b 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c | |||
@@ -189,6 +189,20 @@ static void *mmap_file(char const *fname) | |||
189 | addr = umalloc(sb.st_size); | 189 | addr = umalloc(sb.st_size); |
190 | uread(fd_map, addr, sb.st_size); | 190 | uread(fd_map, addr, sb.st_size); |
191 | } | 191 | } |
192 | if (sb.st_nlink != 1) { | ||
193 | /* file is hard-linked, break the hard link */ | ||
194 | close(fd_map); | ||
195 | if (unlink(fname) < 0) { | ||
196 | perror(fname); | ||
197 | fail_file(); | ||
198 | } | ||
199 | fd_map = open(fname, O_RDWR | O_CREAT, sb.st_mode); | ||
200 | if (fd_map < 0) { | ||
201 | perror(fname); | ||
202 | fail_file(); | ||
203 | } | ||
204 | uwrite(fd_map, addr, sb.st_size); | ||
205 | } | ||
192 | return addr; | 206 | return addr; |
193 | } | 207 | } |
194 | 208 | ||