Revision 233ba2c5ffcf83f3dee3f4451724273f76cb7d8b authored by Linus Torvalds on 04 March 2012, 00:33:51 UTC, committed by Linus Torvalds on 04 March 2012, 00:33:51 UTC
PARISC fixes from James Bottomley: "This is a set of build fixes to get the cross compiled architecture testbeds building again" * tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6: [PARISC] don't unconditionally override CROSS_COMPILE for 64 bit. [PARISC] include <linux/prefetch.h> in drivers/parisc/iommu-helpers.h [PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional
truncate.h
/*
* linux/fs/ext4/truncate.h
*
* Common inline functions needed for truncate support
*/
/*
* Truncate blocks that were not used by write. We have to truncate the
* pagecache as well so that corresponding buffers get properly unmapped.
*/
static inline void ext4_truncate_failed_write(struct inode *inode)
{
truncate_inode_pages(inode->i_mapping, inode->i_size);
ext4_truncate(inode);
}
/*
* Work out how many blocks we need to proceed with the next chunk of a
* truncate transaction.
*/
static inline unsigned long ext4_blocks_for_truncate(struct inode *inode)
{
ext4_lblk_t needed;
needed = inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9);
/* Give ourselves just enough room to cope with inodes in which
* i_blocks is corrupt: we've seen disk corruptions in the past
* which resulted in random data in an inode which looked enough
* like a regular file for ext4 to try to delete it. Things
* will go a bit crazy if that happens, but at least we should
* try not to panic the whole kernel. */
if (needed < 2)
needed = 2;
/* But we need to bound the transaction so we don't overflow the
* journal. */
if (needed > EXT4_MAX_TRANS_DATA)
needed = EXT4_MAX_TRANS_DATA;
return EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
}
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