linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-23 06:17:31 -04:00

Files

Tejun Heo 71385b78db arm64: mm: Complete the PTE store in ptep_try_set()

ptep_try_set() installs a kernel PTE with try_cmpxchg() but, unlike
__set_pte(), skips the barriers that arm64 requires after writing a valid
kernel PTE. Without them a subsequent access can fault instead of seeing
the new mapping.

Issue them with emit_pte_barriers() rather than __set_pte_complete().
ptep_try_set() must finish the store before it returns, but
__set_pte_complete() would defer the barriers when the calling context is in
lazy MMU mode.

v2: Emit the barriers directly instead of __set_pte_complete(). (Catalin)

Fixes: 258df8fce4 ("mm: Add ptep_try_set() for lockless empty-slot installs")
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/all/aiRFcz78QTZdIHHB@arm.com/
Link: https://lore.kernel.org/bpf/7f5f7c94601312c1a401fb18998291cc@kernel.org
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

2026-06-08 13:30:01 +02:00

alpha

ring-buffer: Flush and stop persistent ring buffer on panic

2026-05-21 08:20:58 -04:00

arc

ring-buffer: Flush and stop persistent ring buffer on panic

2026-05-21 08:20:58 -04:00

arm

Merge tag 'trace-ringbuffer-v7.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-05-21 14:05:09 -07:00

arm64

arm64: mm: Complete the PTE store in ptep_try_set()