[S390] Add dynamic size check for usercopy functions.

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Use a wrapper for copy_to/from_user to chose the best usercopy method.
The mvcos instruction is better for sizes greater than 256 bytes, if
mvcos is not available a page table walk is better for sizes greater
than 1024 bytes. Also removed the redundant copy_to/from_user_std_small
functions.

Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Gerald Schaefer 2006-12-04 15:40:45 +01:00 • committed by Martin Schwidefsky

parent d57de5a367

commit 59f35d53fd

4 changed files with 190 additions and 59 deletions

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2

arch/s390/lib/Makefile

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27

arch/s390/lib/uaccess_mvcos.c

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153

arch/s390/lib/uaccess_pt.c

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67

arch/s390/lib/uaccess_std.c

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