Skip to content
GitLab
Projects Groups Snippets
  • /
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
  • Sign in
  • L linux-ae
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
    • Locked Files
  • Issues 0
    • Issues 0
    • List
    • Boards
    • Service Desk
    • Milestones
    • Iterations
    • Requirements
  • Merge requests 0
    • Merge requests 0
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
    • Test Cases
  • Deployments
    • Deployments
    • Environments
    • Releases
  • Packages and registries
    • Packages and registries
    • Container Registry
  • Monitor
    • Monitor
    • Incidents
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Code review
    • Insights
    • Issue
    • Repository
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • linux-arm
  • linux-ae
  • Repository
Switch branch/tag
  • linux-ae
  • arch
  • x86
  • kernel
  • alternative.c
Find file BlameHistoryPermalink
  • Sebastian Andrzej Siewior's avatar
    x86/alternatives: Acquire pte lock with interrupts enabled · a6d996cb
    Sebastian Andrzej Siewior authored Aug 13, 2020
    
    
    pte lock is never acquired in-IRQ context so it does not require interrupts
    to be disabled. The lock is a regular spinlock which cannot be acquired
    with interrupts disabled on RT.
    
    RT complains about pte_lock() in __text_poke() because it's invoked after
    disabling interrupts.
    
    __text_poke() has to disable interrupts as use_temporary_mm() expects
    interrupts to be off because it invokes switch_mm_irqs_off() and uses
    per-CPU (current active mm) data.
    
    Move the PTE lock handling outside the interrupt disabled region.
    
    Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Acked-by; Peter Zijlstra (Intel) <peterz@infradead.org>
    Link: https://lore.kernel.org/r/20200813105026.bvugytmsso6muljw@linutronix.de
    a6d996cb