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selftests/vm/pkeys: fix alloc_random_pkey() to make it really random
[ Upstream commit 6e373263ce
]
alloc_random_pkey() was allocating the same pkey every time. Not all
pkeys were geting tested. This fixes it.
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: "Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Suchanek <msuchanek@suse.de>
Cc: Shuah Khan <shuah@kernel.org>
Link: http://lkml.kernel.org/r/0162f55816d4e783a0d6e49e554d0ab9a3c9a23b.1585646528.git.sandipan@linux.ibm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
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1 changed files with 2 additions and 1 deletions
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@ -24,6 +24,7 @@
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#define _GNU_SOURCE
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#include <errno.h>
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#include <linux/futex.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/syscall.h>
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#include <string.h>
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@ -612,10 +613,10 @@ int alloc_random_pkey(void)
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int nr_alloced = 0;
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int random_index;
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memset(alloced_pkeys, 0, sizeof(alloced_pkeys));
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srand((unsigned int)time(NULL));
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/* allocate every possible key and make a note of which ones we got */
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max_nr_pkey_allocs = NR_PKEYS;
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max_nr_pkey_allocs = 1;
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for (i = 0; i < max_nr_pkey_allocs; i++) {
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int new_pkey = alloc_pkey();
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if (new_pkey < 0)
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