Linux 3.19 has NOT been released.
Summary: (not completed)
1. Prominent features
2. Drivers and architectures
All the driver and architecture-specific changes can be found in the [http://kernelnewbies.org/Linux_3.19-DriversArch Linux_3.19-DriversArch page]
3. File systems
4. Memory management
5. Block
6. Core (various)
7. Cryptography
Add user space interface for AEAD [http://git.kernel.org/linus/af8e80731a94ff9de9508b01d9e5d931d538dc6b commit]
crc32: Add ARM64 CRC32 hw accelerated module [http://git.kernel.org/linus/f6f203faa3ebd8fa229e34424850a0919ded6c10 commit]
sahara: add support for SHA1/256 [http://git.kernel.org/linus/5a2bb93f599247e049f5ae06a573f1152987c572 commit]
caam: add support for AES working in Galois Counter Mode [http://git.kernel.org/linus/3ef8d945d0dafd272e77c01099bc4975c5297a5a (commit)], add support for AES in Galois/Counter Mode as an IPsec Encapsulating Security Payload mechanism [http://git.kernel.org/linus/bac68f2c9a43e60a70e27c0c75aaca7128b6271d (commit)], add support for AES working in Counter mode [http://git.kernel.org/linus/2b22f6c547f90e1a41e3f39ad8d569e3efc74d42 (commit)], add support for AES Counter Mode compliant with RFC3686 to be used along with authenc algorithms (md5, sha1, sha224, sha256, sha384, sha512) as one-shot aead algorithms [http://git.kernel.org/linus/daebc465858867f48ee86a88f56020c3fe0d96f6 (commit)], add support for one-shot givencrypt algorithms [http://git.kernel.org/linus/7222d1a3410388c8e21a5028ba2beb498938b57f (commit)], add support for Advanced Encryption Standard in Counter Mode as provided in IPsec implementation standard RFC3686 [http://git.kernel.org/linus/a5f57cffce8af8d2c11204b4e289543021c73766 (commit)], add support for AES-GMAC as an IPSec ESP mechanism to provide data origin authentication, but not confidentiality [http://git.kernel.org/linus/5d0429a30f06845af78a696de59e3e8d21252846 (commit)]
8. Security
9. Virtualization
10. Tracing & perf