Linux Kernel: Release Candidate 4 Steadies the Ship

Linux 7.2-rc4 landed with six subsystem fix pulls covering block I/O, io_uring, RISC-V, x86 boot, SPI, and regulator drivers—almost entirely correctness and edge-case fixes rather than new features, the expected pattern this late in a release cycle.

Duration: PT2M21S

Episode overview

This episode is a short developer briefing from Linux Kernel.

It explains recent repository work in plain language.

  • Show: Linux Kernel
  • Published: 2026-07-20T13:12:40Z
  • Audio duration: PT2M21S

Transcript excerpt

This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.

Good day, and welcome to Linux Kernel briefing for July 20th, 2026.

The headline today is stabilization. This is rc4 territory, and the merges Linus pulled in all fit the pattern: narrow, defensive fixes to code paths that fail rarely but matter a lot when they do.

Start with block and io_uring, both from Jens Axboe. The block pull, commit 980ab36, fixes a double-unpin bug in bounced direct I/O read bios, a race in blk_time_get_ns that could silently return zero, and a leak in blk-cgroup when a radix tree insert fails. It also fixes loop devices leaving behind dead partitions…

Second theme: architecture-level boot and memory safety. The RISC-V pull, commit 82a4758, adds a cache flush after vmemmap hotplug to stop spurious faults from stale cached page table entries — notably, that fix applies across architectures, not just RISC-V. The x86 pull, commit 502c9e9, closes off two…

Rounding it out, SPI and regulator each got a single targeted driver fix — a DMA timeout issue in the Cadence QuadSPI controller, and incorrect interrupt status bit offsets in the LTC3676 regulator driver. Low blast radius, but they'd cause real hardware misbehavior if left in.

What to remember: nothing here…

Nearby episodes from Linux Kernel

  1. Weekly Recap - Late-Cycle Fixes Across Storage, Graphics, and Security
  2. Late-Cycle Fix Wave Across Subsystems
  3. Display Timing Fixes and a Server-Side Security Sweep
  4. Release Candidate Cleanup Across the Board
  5. Testing Infrastructure Fixes Land for 7.2
  6. Late-Cycle Fixes Land for Sound and Btrfs
  7. Late-Cycle Cleanup as 7.2 Nears Release
  8. The RC3 Security Sweep