btrfs: fix empty_zero_page misusage

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Heiko Carstens noticed that btrfs was using empty_zero_page
incorrectly.  He explained:

	The definition of empty_zero_page is architecture specific.  It
	is (currently) either a character array, an unsigned long
	containing the address of the empty_zero_page, or even worse
	only the address of the struct page belonging to the
	empty_zero_page.

This commit changes btrfs to use a for-loop instead.  On x86
the resulting .ko is smaller, and we're no longer worrying about
how each arch builds its zeros.

Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

...

This commit is contained in:

Chris Mason 2013-11-15 12:14:55 +01:00

parent 91aef86f3b

commit 46e0f66a0c

1 changed files with 7 additions and 2 deletions

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9

fs/btrfs/ioctl.c

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