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| author | Yury Norov <ynorov@caviumnetworks.com> | 2017-09-08 16:15:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:49 -0700 |
| commit | 60ef690018b262ddcd0d51edf10e40710deb9c9f (patch) | |
| tree | 750a8d36ead88274e5afc75c4e7fea117558e61c /lib/test_bitmap.c | |
| parent | 6df0d464dbcc1a55d10ded413beda167cb3c71b0 (diff) | |
| download | lwn-60ef690018b262ddcd0d51edf10e40710deb9c9f.tar.gz lwn-60ef690018b262ddcd0d51edf10e40710deb9c9f.zip | |
bitmap: introduce BITMAP_FROM_U64()
The macro is the compile-time analogue of bitmap_from_u64() with the same
purpose: convert the 64-bit number to the properly ordered pair of 32-bit
parts, suitable for filling the bitmap in 32-bit BE environment.
Use it to make test_bitmap_parselist() correct for 32-bit BE ABIs.
Tested on BE mips/qemu.
[akpm@linux-foundation.org: tweak code comment]
Link: http://lkml.kernel.org/r/20170810172916.24144-1-ynorov@caviumnetworks.com
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Cc: Noam Camus <noamca@mellanox.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_bitmap.c')
| -rw-r--r-- | lib/test_bitmap.c | 47 |
1 files changed, 32 insertions, 15 deletions
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index 431c97fb1aa0..599c6713f2a2 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -175,24 +175,41 @@ struct test_bitmap_parselist{ const int flags; }; -static const unsigned long exp[] = {1, 2, 0x0000ffff, 0xffff0000, 0x55555555, - 0xaaaaaaaa, 0x11111111, 0x22222222, 0xffffffff, - 0xfffffffe, 0x3333333311111111, 0xffffffff77777777}; -static const unsigned long exp2[] = {0x3333333311111111, 0xffffffff77777777}; +static const unsigned long exp[] __initconst = { + BITMAP_FROM_U64(1), + BITMAP_FROM_U64(2), + BITMAP_FROM_U64(0x0000ffff), + BITMAP_FROM_U64(0xffff0000), + BITMAP_FROM_U64(0x55555555), + BITMAP_FROM_U64(0xaaaaaaaa), + BITMAP_FROM_U64(0x11111111), + BITMAP_FROM_U64(0x22222222), + BITMAP_FROM_U64(0xffffffff), + BITMAP_FROM_U64(0xfffffffe), + BITMAP_FROM_U64(0x3333333311111111), + BITMAP_FROM_U64(0xffffffff77777777) +}; + +static const unsigned long exp2[] __initconst = { + BITMAP_FROM_U64(0x3333333311111111), + BITMAP_FROM_U64(0xffffffff77777777) +}; static const struct test_bitmap_parselist parselist_tests[] __initconst = { +#define step (sizeof(u64) / sizeof(unsigned long)) + {0, "0", &exp[0], 8, 0}, - {0, "1", &exp[1], 8, 0}, - {0, "0-15", &exp[2], 32, 0}, - {0, "16-31", &exp[3], 32, 0}, - {0, "0-31:1/2", &exp[4], 32, 0}, - {0, "1-31:1/2", &exp[5], 32, 0}, - {0, "0-31:1/4", &exp[6], 32, 0}, - {0, "1-31:1/4", &exp[7], 32, 0}, - {0, "0-31:4/4", &exp[8], 32, 0}, - {0, "1-31:4/4", &exp[9], 32, 0}, - {0, "0-31:1/4,32-63:2/4", &exp[10], 64, 0}, - {0, "0-31:3/4,32-63:4/4", &exp[11], 64, 0}, + {0, "1", &exp[1 * step], 8, 0}, + {0, "0-15", &exp[2 * step], 32, 0}, + {0, "16-31", &exp[3 * step], 32, 0}, + {0, "0-31:1/2", &exp[4 * step], 32, 0}, + {0, "1-31:1/2", &exp[5 * step], 32, 0}, + {0, "0-31:1/4", &exp[6 * step], 32, 0}, + {0, "1-31:1/4", &exp[7 * step], 32, 0}, + {0, "0-31:4/4", &exp[8 * step], 32, 0}, + {0, "1-31:4/4", &exp[9 * step], 32, 0}, + {0, "0-31:1/4,32-63:2/4", &exp[10 * step], 64, 0}, + {0, "0-31:3/4,32-63:4/4", &exp[11 * step], 64, 0}, {0, "0-31:1/4,32-63:2/4,64-95:3/4,96-127:4/4", exp2, 128, 0}, |