diff options
| author | Mikhail Zaslonko <zaslonko@linux.ibm.com> | 2020-01-30 22:16:30 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-31 10:30:40 -0800 |
| commit | 803521b149c8c71a712445a32bd9316e074df76a (patch) | |
| tree | 6a739818beeedb2cdea05dbcc083eb8013989442 /lib/zlib_dfltcc/dfltcc.h | |
| parent | c65e6815db1c2e28d5554bd99d3a6e522ab599d1 (diff) | |
lib/zlib: add zlib_deflate_dfltcc_enabled() function
Add a new function to zlib.h checking if s390 Deflate-Conversion
facility is installed and enabled.
Link: http://lkml.kernel.org/r/20200103223334.20669-6-zaslonko@linux.ibm.com
Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Cc: Chris Mason <clm@fb.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Eduard Shishkin <edward6@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/zlib_dfltcc/dfltcc.h')
| -rw-r--r-- | lib/zlib_dfltcc/dfltcc.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/zlib_dfltcc/dfltcc.h b/lib/zlib_dfltcc/dfltcc.h index be70c807b62f..2a2fac1d050a 100644 --- a/lib/zlib_dfltcc/dfltcc.h +++ b/lib/zlib_dfltcc/dfltcc.h @@ -3,6 +3,8 @@ #define DFLTCC_H #include "../zlib_deflate/defutil.h" +#include <asm/facility.h> +#include <asm/setup.h> /* * Tuning parameters. @@ -14,6 +16,8 @@ #define DFLTCC_DHT_MIN_SAMPLE_SIZE 4096 #define DFLTCC_RIBM 0 +#define DFLTCC_FACILITY 151 + /* * Parameter Block for Query Available Functions. */ @@ -113,6 +117,11 @@ typedef enum { } dfltcc_inflate_action; dfltcc_inflate_action dfltcc_inflate(z_streamp strm, int flush, int *ret); +static inline int is_dfltcc_enabled(void) +{ +return (zlib_dfltcc_support != ZLIB_DFLTCC_DISABLED && + test_facility(DFLTCC_FACILITY)); +} #define DEFLATE_RESET_HOOK(strm) \ dfltcc_reset((strm), sizeof(deflate_state)) @@ -121,6 +130,8 @@ dfltcc_inflate_action dfltcc_inflate(z_streamp strm, #define DEFLATE_NEED_CHECKSUM(strm) (!dfltcc_can_deflate((strm))) +#define DEFLATE_DFLTCC_ENABLED() is_dfltcc_enabled() + #define INFLATE_RESET_HOOK(strm) \ dfltcc_reset((strm), sizeof(struct inflate_state)) |