Hi Ben,
This is a new Smatch warning in linux-next. It comes from: a11c3198c
"drm/nv50: import new vm code"
drivers/gpu/drm/nouveau/nv50_vm.c +104 nv50_vm_map(13)
warn: bogus compare against zero: 'i'
94 u32 block, i;
95
96 phys = nv50_vm_addr(vma, pgt, phys, mem->memtype, 0);
97 pte <<= 3;
98 cnt <<= 3;
99
100 while (cnt) {
101 u32 offset_h = upper_32_bits(phys);
102 u32 offset_l = lower_32_bits(phys);
103
104 for (i = 7; i >= 0; i--) {
^^^^^^
i is unsigned so this test is always true.
105 block = 1 << (i + 3);
106 if (cnt >= block && !(pte & (block - 1)))
107 break;
108 }
109 offset_l |= (i << 7);
regards,
dan carpenter
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