)]}'
{
  "commit": "536788fe2d28e11db6aeda74207d95d750fb761f",
  "tree": "73df2d3a46c542c71d3a84c20c8fd1ce617386a3",
  "parents": [
    "2f569afd9ced9ebec9a6eb3dbf6f83429be0a7b4"
  ],
  "author": {
    "name": "Jeff Dike",
    "email": "jdike@addtoit.com",
    "time": "Fri Feb 08 04:22:07 2008 -0800"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@woody.linux-foundation.org",
    "time": "Fri Feb 08 09:22:42 2008 -0800"
  },
  "message": "uml: runtime host VMSPLIT detection\n\nCalculate TASK_SIZE at run-time by figuring out the host\u0027s VMSPLIT - this is\nneeded on i386 if UML is to run on hosts with varying VMSPLITs without\nrecompilation.\n\nTASK_SIZE is now defined in terms of a variable, task_size.  This gets rid of\nan include of pgtable.h from processor.h, which can cause include loops.\n\nOn i386, task_size is calculated early in boot by probing the address space in\na binary search to figure out where the boundary between usable and non-usable\nmemory is.  This tries to make sure that a page that is considered to be in\nuserspace is, or can be made, read-write.  I\u0027m concerned about a system-global\nVDSO page in kernel memory being hit and considered to be a userspace page.\n\nOn x86_64, task_size is just the old value of CONFIG_TOP_ADDR.\n\nA bunch of config variable are gone now.  CONFIG_TOP_ADDR is directly replaced\nby TASK_SIZE.  NEST_LEVEL is gone since the relocation of the stubs makes it\nirrelevant.  All the HOST_VMSPLIT stuff is gone.  All references to these in\narch/um/Makefile are also gone.\n\nI noticed and fixed a missing extern in os.h when adding os_get_task_size.\n\nNote: This has been revised to fix the 32-bit UML on 64-bit host bug that\nMiklos ran into.\n\nSigned-off-by: Jeff Dike \u003cjdike@linux.intel.com\u003e\nCc: Miklos Szeredi \u003cmiklos@szeredi.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n",
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