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lib/zlib: add zlib_deflate_dfltcc_enabled() function

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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>
This commit is contained in:
Mikhail Zaslonko 2020-01-30 22:16:30 -08:00 • committed by Linus Torvalds
parent c65e6815db
commit 803521b149
5 changed files with 24 additions and 9 deletions
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6
include/linux/zlib.h
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@ -191,6 +191,12 @@ extern int zlib_deflate_workspacesize (int windowBits, int memLevel);
exceed those passed here.
*/
extern int zlib_deflate_dfltcc_enabled (void);
/*
Returns 1 if Deflate-Conversion facility is installed and enabled,
otherwise 0.
*/
/*
extern int deflateInit (z_streamp strm, int level);