On 09/15, Dave Jiang wrote: > Some gcc toolchain are optimizing out the memcpy and this causes dax-errors > to not trigger the SIG_BUS when doing memcpy on an mmap'd buffer. By moving > the buffer to a global variable this bypasses the optimization and allow > the test to work as intended. > > Signed-off-by: Dave Jiang <[email protected]> > --- > test/dax-errors.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) >
Reviewed-by: Vishal Verma <[email protected]> > diff --git a/test/dax-errors.c b/test/dax-errors.c > index 11d0031..9ea5c91 100644 > --- a/test/dax-errors.c > +++ b/test/dax-errors.c > @@ -17,6 +17,8 @@ > > static sigjmp_buf sj_env; > static int sig_count; > +/* buf is global in order to avoid gcc memcpy optimization */ > +static void *buf; > > static void sigbus_hdl(int sig, siginfo_t *siginfo, void *ptr) > { > @@ -27,7 +29,7 @@ static void sigbus_hdl(int sig, siginfo_t *siginfo, void > *ptr) > > static int test_dax_read_err(int fd) > { > - void *base, *buf; > + void *base; > int rc = 0; > > if (fd < 0) { > _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
