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    • Bernhard Walle's avatar
      Introduce flags for reserve_bootmem() · 72a7fe39
      Bernhard Walle authored
      
      
      This patchset adds a flags variable to reserve_bootmem() and uses the
      BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
      between crashkernel area and already used memory.
      
      This patch:
      
      Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
      If that flag is set, the function returns with -EBUSY if the memory already
      has been reserved in the past.  This is to avoid conflicts.
      
      Because that code runs before SMP initialisation, there's no race condition
      inside reserve_bootmem_core().
      
      [akpm@linux-foundation.org: coding-style fixes]
      [akpm@linux-foundation.org: fix powerpc build]
      Signed-off-by: default avatarBernhard Walle <bwalle@suse.de>
      Cc: <linux-arch@vger.kernel.org>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Vivek Goyal <vgoyal@in.ibm.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      72a7fe39
  18. 05 Feb, 2008 2 commits