)]}'
{
  "commit": "a8fb5618dab7e45c8990f3155628d772a9ed45f9",
  "tree": "77977b8fb2f57c855da9e3168977521e8393776a",
  "parents": [
    "2c0b381467bc2997be9d741a152f3fc75785eedc"
  ],
  "author": {
    "name": "Hugh Dickins",
    "email": "hugh@veritas.com",
    "time": "Sat Oct 29 18:15:57 2005 -0700"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@g5.osdl.org",
    "time": "Sat Oct 29 21:40:37 2005 -0700"
  },
  "message": "[PATCH] mm: unlink_file_vma, remove_vma\n\nDivide remove_vm_struct into two parts: first anon_vma_unlink plus\nunlink_file_vma, to unlink the vma from the list and tree by which rmap or\nvmtruncate might find it; then remove_vma to close, fput and free.\n\nThe intention here is to do the anon_vma_unlink and unlink_file_vma earlier,\nin free_pgtables before freeing any page tables: so we can be sure that any\npage tables traversed by rmap and vmtruncate are stable (and other, ordinary\ncases are stabilized by holding mmap_sem).\n\nThis will be crucial to traversing pgd,pud,pmd without page_table_lock.  But\ntesting the split-out patch showed that lifting the page_table_lock is\nsymbiotically necessary to make this change - the lock ordering is wrong to\nmove those unlinks into free_pgtables while it\u0027s under ptlock.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "376a466743bc3144c7f592717d25b574ff16990b",
      "old_mode": 33188,
      "old_path": "include/linux/mm.h",
      "new_id": "0c64484d8ae0ca61da9a07c7b46d6787c8294d6b",
      "new_mode": 33188,
      "new_path": "include/linux/mm.h"
    },
    {
      "type": "modify",
      "old_id": "eeefe19a0facb2c3add503b821b21097c0572fa8",
      "old_mode": 33188,
      "old_path": "mm/mmap.c",
      "new_id": "a3984fad3fc2cb61257e3a1f585195a8a5f9afb7",
      "new_mode": 33188,
      "new_path": "mm/mmap.c"
    }
  ]
}