diff options
| author | Mike Galbraith <[email protected]> | 2022-01-21 22:14:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2022-01-22 08:33:37 +0200 |
| commit | a37265995c867a4e413761d846cef0445b08d6d5 (patch) | |
| tree | 994b5c69c3d69573702b62d045868f235b75ace5 /drivers/pnp/isapnp/proc.c | |
| parent | b475d42d2c43321d8bea685f54916220cb76b511 (diff) | |
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/[email protected]
Signed-off-by: Mike Galbraith <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Minchan Kim <[email protected]>
Tested-by: Sebastian Andrzej Siewior <[email protected]>
Cc: Peter Zijlstra (Intel) <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'drivers/pnp/isapnp/proc.c')
0 files changed, 0 insertions, 0 deletions