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Subject[PATCH RFC PKS/PMEM 15/58] fs/ecryptfs: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

The kmap() calls in this FS are localized to a single thread. To avoid
the over head of global PKRS updates use the new kmap_thread() call.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
fs/ecryptfs/crypto.c | 8 ++++----
fs/ecryptfs/read_write.c | 8 ++++----
2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 0681540c48d9..e73e00994bee 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -469,10 +469,10 @@ int ecryptfs_encrypt_page(struct page *page)
}

lower_offset = lower_offset_for_page(crypt_stat, page);
- enc_extent_virt = kmap(enc_extent_page);
+ enc_extent_virt = kmap_thread(enc_extent_page);
rc = ecryptfs_write_lower(ecryptfs_inode, enc_extent_virt, lower_offset,
PAGE_SIZE);
- kunmap(enc_extent_page);
+ kunmap_thread(enc_extent_page);
if (rc < 0) {
ecryptfs_printk(KERN_ERR,
"Error attempting to write lower page; rc = [%d]\n",
@@ -518,10 +518,10 @@ int ecryptfs_decrypt_page(struct page *page)
BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));

lower_offset = lower_offset_for_page(crypt_stat, page);
- page_virt = kmap(page);
+ page_virt = kmap_thread(page);
rc = ecryptfs_read_lower(page_virt, lower_offset, PAGE_SIZE,
ecryptfs_inode);
- kunmap(page);
+ kunmap_thread(page);
if (rc < 0) {
ecryptfs_printk(KERN_ERR,
"Error attempting to read lower page; rc = [%d]\n",
diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index 0438997ac9d8..5eca4330c0c0 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -64,11 +64,11 @@ int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,

offset = ((((loff_t)page_for_lower->index) << PAGE_SHIFT)
+ offset_in_page);
- virt = kmap(page_for_lower);
+ virt = kmap_thread(page_for_lower);
rc = ecryptfs_write_lower(ecryptfs_inode, virt, offset, size);
if (rc > 0)
rc = 0;
- kunmap(page_for_lower);
+ kunmap_thread(page_for_lower);
return rc;
}

@@ -251,11 +251,11 @@ int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
int rc;

offset = ((((loff_t)page_index) << PAGE_SHIFT) + offset_in_page);
- virt = kmap(page_for_ecryptfs);
+ virt = kmap_thread(page_for_ecryptfs);
rc = ecryptfs_read_lower(virt, offset, size, ecryptfs_inode);
if (rc > 0)
rc = 0;
- kunmap(page_for_ecryptfs);
+ kunmap_thread(page_for_ecryptfs);
flush_dcache_page(page_for_ecryptfs);
return rc;
}
--
2.28.0.rc0.12.gb6a658bd00c9
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