The patch titled
Subject: x86/ldt: use vfree_atomic() to free ldt entries
has been removed from the -mm tree. Its filename was
x86-ldt-use-vfree_atomic-to-free-ldt-entries.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: x86/ldt: use vfree_atomic() to free ldt entries
vfree() is going to use sleeping lock. free_ldt_struct() may be called
with disabled preemption, therefore we must use vfree_atomic() here.
E.g. call trace:
vfree()
free_ldt_struct()
destroy_context_ldt()
__mmdrop()
finish_task_switch()
schedule_tail()
ret_from_fork()
Link: http://lkml.kernel.org/r/1479474236-4139-7-git-send-email-hch@xxxxxx
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Cc: Joel Fernandes <joelaf@xxxxxxxxxx>
Cc: Jisheng Zhang <jszhang@xxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: John Dias <joaodias@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/ldt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/x86/kernel/ldt.c~x86-ldt-use-vfree_atomic-to-free-ldt-entries arch/x86/kernel/ldt.c
--- a/arch/x86/kernel/ldt.c~x86-ldt-use-vfree_atomic-to-free-ldt-entries
+++ a/arch/x86/kernel/ldt.c
@@ -93,7 +93,7 @@ static void free_ldt_struct(struct ldt_s
paravirt_free_ldt(ldt->entries, ldt->size);
if (ldt->size * LDT_ENTRY_SIZE > PAGE_SIZE)
- vfree(ldt->entries);
+ vfree_atomic(ldt->entries);
else
free_page((unsigned long)ldt->entries);
kfree(ldt);
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
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