Commit 95cb64c1 authored Feb 18, 2017 by Peter Zijlstra Committed by Ingo Molnar Feb 20, 2017

fork: Fix task_struct alignment



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: e274795e ("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>

parent bc88c10d

kernel/fork.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -434,7 +434,7 @@ void __init fork_init(void)
		#ifndef ARCH_MIN_TASKALIGN
		#define ARCH_MIN_TASKALIGN 0
		#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 */
		task_struct_cachep = kmem_cache_create("task_struct",

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