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[ Upstream commit 26794942461f438a6bc725ec7294b08a6bd782c4 ] The include/asm-generic/hugetlb.h stubs that just vector huge_pte_*() calls to the pte_*() implementations won't work in certain situations. x86 and sparc, for example, return "unsigned long" from the bit checks, and just go "return pte_val(pte) & PTE_BIT_FOO;" But since huge_pte_*() returns 'int', if any high bits on 64-bit are relevant, they get chopped off. The net effect is that we can loop forever trying to COW a huge page, because the huge_pte_write() check signals false all the time. Reported-by: Gurudas Pai <gurudas.pai@oracle.com> Tested-by: Gurudas Pai <gurudas.pai@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| clocksource | ||
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| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
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| Kbuild | ||