On 26.11.19 г. 19:36 ч., Omar Sandoval wrote: > On Tue, Nov 26, 2019 at 03:53:02PM +0200, Nikolay Borisov wrote: >> >> >> On 20.11.19 г. 20:24 ч., Omar Sandoval wrote: >>> From: Omar Sandoval <osandov@xxxxxx> >> >> <snip> >> >>> >>> +enum { >>> + ENCODED_IOV_COMPRESSION_NONE, >>> +#define ENCODED_IOV_COMPRESSION_NONE ENCODED_IOV_COMPRESSION_NONE >>> + ENCODED_IOV_COMPRESSION_ZLIB, >>> +#define ENCODED_IOV_COMPRESSION_ZLIB ENCODED_IOV_COMPRESSION_ZLIB >>> + ENCODED_IOV_COMPRESSION_LZO, >>> +#define ENCODED_IOV_COMPRESSION_LZO ENCODED_IOV_COMPRESSION_LZO >>> + ENCODED_IOV_COMPRESSION_ZSTD, >>> +#define ENCODED_IOV_COMPRESSION_ZSTD ENCODED_IOV_COMPRESSION_ZSTD >>> + ENCODED_IOV_COMPRESSION_TYPES = ENCODED_IOV_COMPRESSION_ZSTD, >> >> This looks very dodgy, what am I missing? > > This is a somewhat common trick so that enum values can be checked for > with ifdef/ifndef. See include/uapi/linux.in.h, for example. I cannot seem to have this file on my system (or any .in.h file for that matter in the kernel source dir). >