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authorMike Galbraith <umgwanakikbuti@gmail.com>2022-01-21 22:14:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-22 08:33:37 +0200
commita37265995c867a4e413761d846cef0445b08d6d5 (patch)
tree994b5c69c3d69573702b62d045868f235b75ace5 /fs/proc
parentb475d42d2c43321d8bea685f54916220cb76b511 (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/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 'fs/proc')
0 files changed, 0 insertions, 0 deletions