Skip to content

K
Kernel

openeuler / Kernel
1 年多 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
切换分支/标签
  1. 17 6月, 2013 2 次提交
  3. 21 5月, 2013 5 次提交
  5. 03 5月, 2013 2 次提交
  7. 02 5月, 2013 2 次提交
  9. 30 4月, 2013 1 次提交
    • G
      mm/hugetlb: add more arch-defined huge_pte functions · 106c992a
      由 Gerald Schaefer 提交于 
      Commit abf09bed ("s390/mm: implement software dirty bits")
introduced another difference in the pte layout vs.  the pmd layout on
s390, thoroughly breaking the s390 support for hugetlbfs.  This requires
replacing some more pte_xxx functions in mm/hugetlbfs.c with a
huge_pte_xxx version.

This patch introduces those huge_pte_xxx functions and their generic
implementation in asm-generic/hugetlb.h, which will now be included on
all architectures supporting hugetlbfs apart from s390.  This change
will be a no-op for those architectures.

[akpm@linux-foundation.org: fix warning]
Signed-off-by: NGerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Hillf Danton <dhillf@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.cz>	[for !s390 parts]
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      106c992a
  11. 26 4月, 2013 2 次提交
  13. 23 4月, 2013 6 次提交
  15. 17 4月, 2013 12 次提交
  17. 02 4月, 2013 2 次提交
    • H
      s390/mm: provide emtpy check_pgt_cache() function · 765a0cac
      由 Heiko Carstens 提交于 
      All architectures need to provide a check_pgt_cache() function. The s390 one
got lost somewhere.
So reintroduce it to prevent future compile errors e.g. if Thomas Gleixner's
idle loop rework patches get merged.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      765a0cac
    • H
      s390/uaccess: fix page table walk · ea81531d
      由 Heiko Carstens 提交于 
      When translating user space addresses to kernel addresses the follow_table()
function had two bugs:

- PROT_NONE mappings could be read accessed via the kernel mapping. That is
  e.g. putting a filename into a user page, then protecting the page with
  PROT_NONE and afterwards issuing the "open" syscall with a pointer to
  the filename would incorrectly succeed.

- when walking the page tables it used the pgd/pud/pmd/pte primitives which
  with dynamic page tables give no indication which real level of page tables
  is being walked (region2, region3, segment or page table). So in case of an
  exception the translation exception code passed to __handle_fault() is not
  necessarily correct.
  This is not really an issue since __handle_fault() doesn't evaluate the code.
  Only in case of e.g. a SIGBUS this code gets passed to user space. If user
  space can do something sane with the value is a different question though.

To fix these issues don't use any Linux primitives. Only walk the page tables
like the hardware would do it, however we leave quite some checks away since
we know that we only have full size page tables and each index is within bounds.

In theory this should fix all issues...
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: NGerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      ea81531d
  19. 01 4月, 2013 1 次提交
    • K
      net: add option to enable error queue packets waking select · 7d4c04fc
      由 Keller, Jacob E 提交于 
      Currently, when a socket receives something on the error queue it only wakes up
the socket on select if it is in the "read" list, that is the socket has
something to read. It is useful also to wake the socket if it is in the error
list, which would enable software to wait on error queue packets without waking
up for regular data on the socket. The main use case is for receiving
timestamped transmit packets which return the timestamp to the socket via the
error queue. This enables an application to select on the socket for the error
queue only instead of for the regular traffic.

-v2-
* Added the SO_SELECT_ERR_QUEUE socket option to every architechture specific file
* Modified every socket poll function that checks error queue
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Cc: Jeffrey Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Matthew Vick <matthew.vick@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7d4c04fc
  21. 11 3月, 2013 1 次提交
  23. 08 3月, 2013 1 次提交
  25. 07 3月, 2013 3 次提交