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fork: Fix task_struct alignment

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Stupid bug that wrecked the alignment of task_struct and causes WARN()s
in the x86 FPU code on some platforms.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: e274795ea7 ("locking/mutex: Fix mutex handoff")
Link: http://lkml.kernel.org/r/20170218142645.GH6500@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2017-02-18 15:26:45 +01:00 • committed by Ingo Molnar
parent bc88c10d7e
commit 95cb64c1fe
1 changed files with 1 additions and 1 deletions
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2
kernel/fork.c
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@ -434,7 +434,7 @@ void __init fork_init(void)
#ifndef ARCH_MIN_TASKALIGN #ifndef ARCH_MIN_TASKALIGN
#define ARCH_MIN_TASKALIGN 0 #define ARCH_MIN_TASKALIGN 0
#endif #endif
int align = min_t(int, L1_CACHE_BYTES, ARCH_MIN_TASKALIGN); int align = max_t(int, L1_CACHE_BYTES, ARCH_MIN_TASKALIGN);
/* create a slab on which task_structs can be allocated */ /* create a slab on which task_structs can be allocated */
task_struct_cachep = kmem_cache_create("task_struct", task_struct_cachep = kmem_cache_create("task_struct",