On Sat, Mar 27, 2021 at 2:48 PM Oleksandr Natalenko
[off-list ref] wrote:

Hello.

On Sat, Mar 27, 2021 at 05:48:01PM +0800, kernel test robot wrote:

quoted

quoted

quoted

ERROR: modpost: "ZSTD_maxCLevel" [fs/f2fs/f2fs.ko] undefined!

Since f2fs can be built as a module, the following correction seems to
be needed:

Thanks Oleksandr! Looks like f2fs has been updated to use
ZSTD_maxCLevel() since the first version of these patches. I'll put up
a new version shortly with the fix, and update my test suite to build
f2fs and other users as modules, so it can catch this.

Best,
Nick

diff --git a/lib/zstd/compress/zstd_compress.c b/lib/zstd/compress/zstd_compress.c
index 9c998052a0e5..584c92c51169 100644
--- a/lib/zstd/compress/zstd_compress.c
+++ b/lib/zstd/compress/zstd_compress.c
@@ -4860,6 +4860,7 @@ size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output)

 #define ZSTD_MAX_CLEVEL     22
 int ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
+EXPORT_SYMBOL(ZSTD_maxCLevel);
 int ZSTD_minCLevel(void) { return (int)-ZSTD_TARGETLENGTH_MAX; }

 static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {

Not sure if the same should be done for `ZSTD_minCLevel()` since I don't
see it being used anywhere else.

--
  Oleksandr Natalenko (post-factum)