diff options
| author | Mike Galbraith <umgwanakikbuti@gmail.com> | 2022-01-22 07:14:17 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-22 07:33:37 +0100 |
| commit | a37265995c867a4e413761d846cef0445b08d6d5 (patch) | |
| tree | 994b5c69c3d69573702b62d045868f235b75ace5 /drivers/crypto | |
| parent | zsmalloc: replace per zpage lock with pool->migrate_lock (diff) | |
| download | linux-a37265995c867a4e413761d846cef0445b08d6d5.tar.xz linux-a37265995c867a4e413761d846cef0445b08d6d5.zip | |
zsmalloc: replace get_cpu_var with local_lock
The usage of get_cpu_var() in zs_map_object() is problematic because it
disables preemption and makes it impossible to acquire any sleeping lock
on PREEMPT_RT such as a spinlock_t.
Replace the get_cpu_var() usage with a local_lock_t which is embedded
struct mapping_area. It ensures that the access the struct is
synchronized against all users on the same CPU.
[minchan: remove the bit_spin_lock part and change the title]
Link: https://lkml.kernel.org/r/20211115185909.3949505-10-minchan@kernel.org
Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/crypto')
0 files changed, 0 insertions, 0 deletions