1. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo 提交于
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  2. 30 7月, 2009 2 次提交
  3. 17 7月, 2009 1 次提交
  4. 01 7月, 2009 1 次提交
  5. 12 6月, 2009 8 次提交
  6. 19 4月, 2009 1 次提交
  7. 30 3月, 2009 1 次提交
  8. 30 12月, 2008 1 次提交
  9. 27 5月, 2008 1 次提交
  10. 19 4月, 2008 1 次提交
  11. 30 1月, 2008 16 次提交
  12. 25 10月, 2007 2 次提交
  13. 23 10月, 2007 4 次提交
    • R
      generalize lgread_u32/lgwrite_u32. · 2d37f94a
      Rusty Russell 提交于
      Jes complains that page table code still uses lgread_u32 even though
      it now uses general kernel pte types.  The best thing to do is to
      generalize lgread_u32 and lgwrite_u32.
      
      This means we lose the efficiency of getuser().  We could potentially
      regain it if we used __copy_from_user instead of copy_from_user, but
      I'm not certain that our range check is equivalent to access_ok() on
      all platforms.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      Acked-by: NJes Sorensen <jes@sgi.com>
      2d37f94a
    • R
      Remove old lguest I/O infrrasructure. · 15045275
      Rusty Russell 提交于
      This patch gets rid of the old lguest host I/O infrastructure and
      replaces it with a single hypercall "LHCALL_NOTIFY" which takes an
      address.
      
      The main change is the removal of io.c: that mainly did inter-guest
      I/O, which virtio doesn't yet support.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      15045275
    • R
      Boot with virtual == physical to get closer to native Linux. · 47436aa4
      Rusty Russell 提交于
      1) This allows us to get alot closer to booting bzImages.
      
      2) It means we don't have to know page_offset.
      
      3) The Guest needs to modify the boot pagetables to create the
         PAGE_OFFSET mapping before jumping to C code.
      
      4) guest_pa() walks the page tables rather than using page_offset.
      
      5) We don't use page_offset to figure out whether to emulate: it was
         always kinda quesationable, and won't work for instructions done
         before remapping (bzImage unpacking in particular).
      
      6) We still want the kernel address for tlb flushing: have the initial
         hypercall give us that, too.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      47436aa4
    • R
      Allow guest to specify syscall vector to use. · c18acd73
      Rusty Russell 提交于
      (Based on Ron Minnich's LGUEST_PLAN9_SYSCALL patch).
      
      This patch allows Guests to specify what system call vector they want,
      and we try to reserve it.  We only allow one non-Linux system call
      vector, to try to avoid DoS on the Host.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      c18acd73