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authorIsabella Basso <isabbasso@riseup.net>2022-01-19 18:09:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-20 08:52:54 +0200
commitae7880676bc8019ff61e49126c558ad7c4b6fa21 (patch)
tree43a27a47e2e5c3a8143b1f01bddd6fd04c0f0f67 /lib/test_hash.c
parentfd0a1462405b087377e59b84e119fe7e2d08499a (diff)
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test_hash.c: split test_int_hash into arch-specific functions
Split the test_int_hash function to keep its mainloop separate from arch-specific chunks, which are only compiled as needed. This aims at improving readability. Link: https://lkml.kernel.org/r/20211208183711.390454-3-isabbasso@riseup.net Reviewed-by: David Gow <davidgow@google.com> Tested-by: David Gow <davidgow@google.com> Signed-off-by: Isabella Basso <isabbasso@riseup.net> Cc: Augusto DurĂ£es Camargo <augusto.duraes33@gmail.com> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: Daniel Latypov <dlatypov@google.com> Cc: Enzo Ferreira <ferreiraenzoa@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: kernel test robot <lkp@intel.com> Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_hash.c')
-rw-r--r--lib/test_hash.c91
1 files changed, 62 insertions, 29 deletions
diff --git a/lib/test_hash.c b/lib/test_hash.c
index d4b0cfdb0377..2b4fe4976cc4 100644
--- a/lib/test_hash.c
+++ b/lib/test_hash.c
@@ -56,6 +56,58 @@ fill_buf(char *buf, size_t len, u32 seed)
}
}
+/* Holds most testing variables for the int test. */
+struct test_hash_params {
+ /* Pointer to integer to be hashed. */
+ unsigned long long *h64;
+ /* Low 32-bits of integer to be hashed. */
+ u32 h0;
+ /* Arch-specific hash result. */
+ u32 h1;
+ /* Generic hash result. */
+ u32 h2;
+ /* ORed hashes of given size (in bits). */
+ u32 (*hash_or)[33];
+};
+
+#ifdef HAVE_ARCH__HASH_32
+static bool __init
+test_int__hash_32(struct test_hash_params *params)
+{
+ params->hash_or[1][0] |= params->h2 = __hash_32_generic(params->h0);
+#if HAVE_ARCH__HASH_32 == 1
+ if (params->h1 != params->h2) {
+ pr_err("__hash_32(%#x) = %#x != __hash_32_generic() = %#x",
+ params->h0, params->h1, params->h2);
+ return false;
+ }
+#endif
+ return true;
+}
+#endif
+
+#ifdef HAVE_ARCH_HASH_64
+static bool __init
+test_int_hash_64(struct test_hash_params *params, u32 const *m, int *k)
+{
+ params->h2 = hash_64_generic(*params->h64, *k);
+#if HAVE_ARCH_HASH_64 == 1
+ if (params->h1 != params->h2) {
+ pr_err("hash_64(%#llx, %d) = %#x != hash_64_generic() = %#x",
+ *params->h64, *k, params->h1, params->h2);
+ return false;
+ }
+#else
+ if (params->h2 > *m) {
+ pr_err("hash_64_generic(%#llx, %d) = %#x > %#x",
+ *params->h64, *k, params->h1, *m);
+ return false;
+ }
+#endif
+ return true;
+}
+#endif
+
/*
* Test the various integer hash functions. h64 (or its low-order bits)
* is the integer to hash. hash_or accumulates the OR of the hash values,
@@ -69,19 +121,13 @@ static bool __init
test_int_hash(unsigned long long h64, u32 hash_or[2][33])
{
int k;
- u32 h0 = (u32)h64, h1, h2;
+ struct test_hash_params params = { &h64, (u32)h64, 0, 0, hash_or };
/* Test __hash32 */
- hash_or[0][0] |= h1 = __hash_32(h0);
+ hash_or[0][0] |= params.h1 = __hash_32(params.h0);
#ifdef HAVE_ARCH__HASH_32
- hash_or[1][0] |= h2 = __hash_32_generic(h0);
-#if HAVE_ARCH__HASH_32 == 1
- if (h1 != h2) {
- pr_err("__hash_32(%#x) = %#x != __hash_32_generic() = %#x",
- h0, h1, h2);
+ if (!test_int__hash_32(&params))
return false;
- }
-#endif
#endif
/* Test k = 1..32 bits */
@@ -89,37 +135,24 @@ test_int_hash(unsigned long long h64, u32 hash_or[2][33])
u32 const m = ((u32)2 << (k-1)) - 1; /* Low k bits set */
/* Test hash_32 */
- hash_or[0][k] |= h1 = hash_32(h0, k);
- if (h1 > m) {
- pr_err("hash_32(%#x, %d) = %#x > %#x", h0, k, h1, m);
+ hash_or[0][k] |= params.h1 = hash_32(params.h0, k);
+ if (params.h1 > m) {
+ pr_err("hash_32(%#x, %d) = %#x > %#x", params.h0, k, params.h1, m);
return false;
}
/* Test hash_64 */
- hash_or[1][k] |= h1 = hash_64(h64, k);
- if (h1 > m) {
- pr_err("hash_64(%#llx, %d) = %#x > %#x", h64, k, h1, m);
+ hash_or[1][k] |= params.h1 = hash_64(h64, k);
+ if (params.h1 > m) {
+ pr_err("hash_64(%#llx, %d) = %#x > %#x", h64, k, params.h1, m);
return false;
}
#ifdef HAVE_ARCH_HASH_64
- h2 = hash_64_generic(h64, k);
-#if HAVE_ARCH_HASH_64 == 1
- if (h1 != h2) {
- pr_err("hash_64(%#llx, %d) = %#x != hash_64_generic() "
- "= %#x", h64, k, h1, h2);
+ if (!test_int_hash_64(&params, &m, &k))
return false;
- }
-#else
- if (h2 > m) {
- pr_err("hash_64_generic(%#llx, %d) = %#x > %#x",
- h64, k, h1, m);
- return false;
- }
-#endif
#endif
}
- (void)h2; /* Suppress unused variable warning */
return true;
}