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author | David Miller <davem@davemloft.net> | 2013-10-02 14:25:09 -0400 |
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committer | David S. Miller <davem@davemloft.net> | 2013-10-02 20:02:35 -0400 |
commit | 26794942461f438a6bc725ec7294b08a6bd782c4 (patch) | |
tree | a6357a628342e523374e08f926bcd9794acdea9b /include/scsi/scsi_device.h | |
parent | 20928bd3f08afb036c096d9559d581926b895918 (diff) | |
download | linux-stable-26794942461f438a6bc725ec7294b08a6bd782c4.tar.gz linux-stable-26794942461f438a6bc725ec7294b08a6bd782c4.tar.bz2 linux-stable-26794942461f438a6bc725ec7294b08a6bd782c4.zip |
mm: Fix generic hugetlb pte check return type.
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>
Diffstat (limited to 'include/scsi/scsi_device.h')
0 files changed, 0 insertions, 0 deletions