Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ecryptfs: use ZERO_PAGE instead of allocating zeroed memory in truncate_upper
Use the existing pre-zeroed memory instead of allocating a new chunk.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tyler Hicks <code@tyhicks.com>
authored by
Christoph Hellwig
and committed by
Tyler Hicks
b19fe74e
b1091873
+2
-9
+2
-9
fs/ecryptfs/inode.c
+2
-9
fs/ecryptfs/inode.c
···
771
771
*/
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772
num_zeros = PAGE_SIZE - (ia->ia_size & ~PAGE_MASK);
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if (num_zeros) {
774
-
char *zeros_virt;
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-
776
-
zeros_virt = kzalloc(num_zeros, GFP_KERNEL);
777
-
if (!zeros_virt) {
778
-
rc = -ENOMEM;
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-
goto out;
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-
}
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-
rc = ecryptfs_write(inode, zeros_virt, ia->ia_size, num_zeros);
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-
kfree(zeros_virt);
774
+
rc = ecryptfs_write(inode, page_address(ZERO_PAGE(0)),
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+
ia->ia_size, num_zeros);
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if (rc) {
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pr_err("Error attempting to zero out the remainder of the end page on reducing truncate; rc = [%d]\n",
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rc);