s390/kaslr: Fix casts in get_random
commit788d671517
upstream. Clang warns: ../arch/s390/boot/kaslr.c:78:25: warning: passing 'char *' to parameter of type 'const u8 *' (aka 'const unsigned char *') converts between pointers to integer types with different sign [-Wpointer-sign] (char *) entropy, (char *) entropy, ^~~~~~~~~~~~~~~~ ../arch/s390/include/asm/cpacf.h:280:28: note: passing argument to parameter 'src' here u8 *dest, const u8 *src, long src_len) ^ 2 warnings generated. Fix the cast to match what else is done in this function. Fixes:b2d24b97b2
("s390/kernel: add support for kernel address space layout randomization (KASLR)") Link: https://github.com/ClangBuiltLinux/linux/issues/862 Link: https://lkml.kernel.org/r/20200208141052.48476-1-natechancellor@gmail.com Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -75,7 +75,7 @@ static unsigned long get_random(unsigned long limit)
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*(unsigned long *) prng.parm_block ^= seed;
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*(unsigned long *) prng.parm_block ^= seed;
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for (i = 0; i < 16; i++) {
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for (i = 0; i < 16; i++) {
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cpacf_kmc(CPACF_KMC_PRNG, prng.parm_block,
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cpacf_kmc(CPACF_KMC_PRNG, prng.parm_block,
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(char *) entropy, (char *) entropy,
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(u8 *) entropy, (u8 *) entropy,
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sizeof(entropy));
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sizeof(entropy));
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memcpy(prng.parm_block, entropy, sizeof(entropy));
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memcpy(prng.parm_block, entropy, sizeof(entropy));
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}
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}
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