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util/cacheinfo: Fix warning generated by clang

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Clang generates the following warning on aarch64 host:

  CC      util/cacheinfo.o
/home/pranith/qemu/util/cacheinfo.c:121:48: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
        asm volatile("mrs\t%0, ctr_el0" : "=r"(ctr));
                                               ^
/home/pranith/qemu/util/cacheinfo.c:121:28: note: use constraint modifier "w"
        asm volatile("mrs\t%0, ctr_el0" : "=r"(ctr));
                           ^~
                           %w0

Constraint modifier 'w' is not (yet?) accepted by gcc. Fix this by increasing the ctr size.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20170630153946.11997-1-bobby.prani@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Pranith Kumar 2017-06-30 11:39:46 -04:00 committed by Richard Henderson
parent 2acee8b2b5
commit 2ae96c157a
1 changed files with 1 additions and 1 deletions
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util/cacheinfo.c
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@ -112,7 +112,7 @@ static void sys_cache_info(int *isize, int *dsize)
static void arch_cache_info(int *isize, int *dsize)
{
if (*isize == 0 || *dsize == 0) {
unsigned ctr;
unsigned long ctr;
/* The real cache geometry is in CCSIDR_EL1/CLIDR_EL1/CSSELR_EL1,
but (at least under Linux) these are marked protected by the