On Wed, Jun 15, 2016 at 02:12:25PM +0200, Arnd Bergmann wrote:
Warnings: 1 arch/arm/include/asm/pgtable.h:262:15: warning: 'entry' may be used uninitialized in this function [-Wmaybe-uninitialized]
I have applied a local workaround to shut up the warning on my machine:
--- a/mm/memory.c +++ b/mm/memory.c @@ -3501,6 +3501,7 @@ static int handle_pte_fault(struct fault_env *fe) * for an instant, it will be difficult to retract from * concurrent faults and from rmap lookups. */
entry = *fe->pte; } else { /* See comment in pte_alloc_one_map() */ if (pmd_trans_unstable(fe->pmd) || pmd_devmap(*fe->pmd))This is probably wrong though.
Yeah, it's NULL-pointer dereferece.
I don't see the warning. What gcc version is it?
The problem appeared with
commit 78d5e6079a91b36ef13a14e4ccb857bf9fb815a4 Author: Kirill A. Shutemov kirill.shutemov@linux.intel.com Date: Thu Jun 9 09:36:11 2016 +1000
mm: postpone page table allocation until we have page to map