[S390] hypfs: Move buffer allocation from open to read

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Currently the buffer for diagnose data is allocated in the open function
of the debugfs file and is released in the close function. This has the
drawback that a user (root) can pin that memory by not closing the file.
This patch moves the buffer allocation to the read function. The buffer is
automatically released after the buffer is copied to userspace.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Michael Holzheu 2011-01-05 12:47:43 +01:00 • committed by Martin Schwidefsky

parent 6432c015b7

commit 2fcb3686e1

6 changed files with 195 additions and 118 deletions

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2

arch/s390/hypfs/Makefile

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33

arch/s390/hypfs/hypfs.h

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116

arch/s390/hypfs/hypfs_dbfs.c

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82

arch/s390/hypfs/hypfs_diag.c

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62

arch/s390/hypfs/hypfs_vm.c

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18

arch/s390/hypfs/inode.c

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