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/linux-master/scripts/kconfig/
H A DMakefilediff 15508d22 Thu Feb 09 09:00:14 MST 2006 Linus Torvalds <torvalds@g5.osdl.org> Revert "[PATCH] kconfig: detect if -lintl is needed when linking conf,mconf"

This reverts commit 5e375bc7d586e0df971734a5a5f1f080ffd89b68.

Kyle McMartin steps on his soap-box:

"Sigh. Can everyone please stop assuming gcc can output to /dev/null?
On several platforms, ld tries to lseek in the output file, and fails
if it can't."

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/linux-master/mm/
H A Dgup.cdiff 15494520 Thu Jan 30 23:12:10 MST 2020 Qiujun Huang <hqjagain@gmail.com> mm: fix gup_pud_range

sorry for not processing for a long time. I met it again.

patch v1 https://lkml.org/lkml/2019/9/20/656

do_machine_check()
do_memory_failure()
memory_failure()
hw_poison_user_mappings()
try_to_unmap()
pteval = swp_entry_to_pte(make_hwpoison_entry(subpage));

...and now we have a swap entry that indicates that the page entry
refers to a bad (and poisoned) page of memory, but gup_fast() at this
level of the page table was ignoring swap entries, and incorrectly
assuming that "!pxd_none() == valid and present".

And this was not just a poisoned page problem, but a generaly swap entry
problem. So, any swap entry type (device memory migration, numa
migration, or just regular swapping) could lead to the same problem.

Fix this by checking for pxd_present(), instead of pxd_none().

Link: http://lkml.kernel.org/r/1578479084-15508-1-git-send-email-hqjagain@gmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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