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authorMikhail Zaslonko <zaslonko@linux.ibm.com>2020-01-30 22:16:30 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-31 10:30:40 -0800
commit803521b149c8c71a712445a32bd9316e074df76a (patch)
tree6a739818beeedb2cdea05dbcc083eb8013989442 /lib/zlib_deflate
parentc65e6815db1c2e28d5554bd99d3a6e522ab599d1 (diff)
downloadlinux-803521b149c8c71a712445a32bd9316e074df76a.tar.bz2
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_deflate')
-rw-r--r--lib/zlib_deflate/deflate.c6
-rw-r--r--lib/zlib_deflate/deflate_syms.c1
2 files changed, 7 insertions, 0 deletions
diff --git a/lib/zlib_deflate/deflate.c b/lib/zlib_deflate/deflate.c
index 0d60d81a2637..8a878d0d892c 100644
--- a/lib/zlib_deflate/deflate.c
+++ b/lib/zlib_deflate/deflate.c
@@ -59,6 +59,7 @@
#define DEFLATE_RESET_HOOK(strm) do {} while (0)
#define DEFLATE_HOOK(strm, flush, bstate) 0
#define DEFLATE_NEED_CHECKSUM(strm) 1
+#define DEFLATE_DFLTCC_ENABLED() 0
#endif
/* ===========================================================================
@@ -1138,3 +1139,8 @@ int zlib_deflate_workspacesize(int windowBits, int memLevel)
+ zlib_deflate_head_memsize(memLevel)
+ zlib_deflate_overlay_memsize(memLevel);
}
+
+int zlib_deflate_dfltcc_enabled(void)
+{
+ return DEFLATE_DFLTCC_ENABLED();
+}
diff --git a/lib/zlib_deflate/deflate_syms.c b/lib/zlib_deflate/deflate_syms.c
index 72fe4b73be53..24b740b99678 100644
--- a/lib/zlib_deflate/deflate_syms.c
+++ b/lib/zlib_deflate/deflate_syms.c
@@ -12,6 +12,7 @@
#include <linux/zlib.h>
EXPORT_SYMBOL(zlib_deflate_workspacesize);
+EXPORT_SYMBOL(zlib_deflate_dfltcc_enabled);
EXPORT_SYMBOL(zlib_deflate);
EXPORT_SYMBOL(zlib_deflateInit2);
EXPORT_SYMBOL(zlib_deflateEnd);