Hi, Minfei
On 03/11/16 at 03:19pm, Minfei Huang wrote:
> On 03/11/16 at 02:21pm, dyoung at redhat.com wrote:
> > @@ -231,7 +231,8 @@ static ssize_t __read_vmcore(char *buffe
> >
> > list_for_each_entry(m, &vmcore_list, list) {
> > if (*fpos < m->offset + m->size) {
> > - tsz = min_t(size_t, m->offset + m->size - *fpos, buflen);
> > + tsz = (size_t)min_lt(m->offset + m->size - *fpos,
> > + buflen);
> > start = m->paddr + *fpos - m->offset;
> > tmp = read_from_oldmem(buffer, tsz, &start, userbuf);
> > if (tmp < 0)
> > @@ -461,7 +462,7 @@ static int mmap_vmcore(struct file *file
> > if (start < m->offset + m->size) {
> > u64 paddr = 0;
> >
> > - tsz = min_t(size_t, m->offset + m->size - start, size);
> > + tsz = (size_t)min_lt(m->offset + m->size - start, size);
> > paddr = m->paddr + start - m->offset;
> > if (vmcore_remap_oldmem_pfn(vma, vma->vm_start + len,
> > paddr >> PAGE_SHIFT, tsz,
>
> Hi, Dave.
>
> Seems the previous parameter is unsigned long long, and the later one is
> size_t. The size of both these types doesn't change in running time, why
> not use min_t(unsigned long long, a, b) instead?
Just want a common macro so it can benefit other users so that we can simply
use it without knowning type details and avoid such similar bugs also.
Thanks
Dave
