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tools/testing/selftests/vm/hugetlb-madvise.c: silence uninitialized variable warning

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This code just reads from memory without caring about the data itself. 
However static checkers complain that "tmp" is never properly initialized.
Initialize it to zero and change the name to "dummy" to show that we
don't care about the value stored in it.

Link: https://lkml.kernel.org/r/YtZ8mKJmktA2GaHB@kili
Fixes: c4b6cb884011 ("selftests/vm: add hugetlb madvise MADV_DONTNEED MADV_REMOVE test")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Souptick Joarder (HPE) <jrdr.linux@gmail.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Dan Carpenter 2022-07-19 12:42:48 +03:00 committed by akpm
parent 6d97cf88dd
commit 3d5367a042
1 changed files with 3 additions and 2 deletions
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5
tools/testing/selftests/vm/hugetlb-madvise.c
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@ -89,10 +89,11 @@ void write_fault_pages(void *addr, unsigned long nr_pages)
void read_fault_pages(void *addr, unsigned long nr_pages)
{
unsigned long i, tmp;
unsigned long dummy = 0;
unsigned long i;
for (i = 0; i < nr_pages; i++)
tmp += *((unsigned long *)(addr + (i * huge_page_size)));
dummy += *((unsigned long *)(addr + (i * huge_page_size)));
}
int main(int argc, char **argv)