커널소스에서 각각 디렉토리및에 .*.o.cmd ...이런 파일이 있는데 용도가 무엇인가요?

두가지의 서로다른 패치를 하고 있는데요.
먼저 하나를 하고 다른 하나를 하면 다음과 같이 나옵니다.

그런데, .*.o.cmd 라는 파일을 생성하게되는데 이미 있기 때문에 생성할 수 없다고 나오거든요.
이때, 이 파일은 어떤 파일들인가요?

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The next patch would create the file crypto/.api.o.cmd,
which already exists! Assume -R? [n] y
patching file crypto/.api.o.cmd
Hunk #1 FAILED at 1.
File crypto/.api.o.cmd is not empty after patch, as expected
1 out of 1 hunk FAILED -- saving rejects to file crypto/.api.o.cmd.rej
The next patch would create the file crypto/.built-in.o.cmd,
which already exists! Assume -R? [n] y
patching file crypto/.built-in.o.cmd
Hunk #1 FAILED at 1.
File crypto/.built-in.o.cmd is not empty after patch, as expected
1 out of 1 hunk FAILED -- saving rejects to file crypto/.built-in.o.cmd.rej
The next patch would create the file crypto/.cipher.o.cmd,
which already exists! Assume -R? [n] y
patching file crypto/.cipher.o.cmd
Hunk #1 FAILED at 1.
File crypto/.cipher.o.cmd is not empty after patch, as expected
1 out of 1 hunk FAILED -- saving rejects to file crypto/.cipher.o.cmd.rej
The next patch would create the file crypto/.compress.o.cmd,
which already exists! Assume -R? [n] n
Apply anyway? [n] y
patching file crypto/.compress.o.cmd
Patch attempted to create file crypto/.compress.o.cmd, which already exists.
Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- saving rejects to file crypto/.compress.o.cmd.rej
The next patch would create the file crypto/.deflate.o.cmd,
which already exists! Assume -R? [n] n
Apply anyway? [n] y
patching file crypto/.deflate.o.cmd
Patch attempted to create file crypto/.deflate.o.cmd, which already exists.
Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- saving rejects to file crypto/.deflate.o.cmd.rej
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감사합니다~~