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authorDavid S. Miller <davem@davemloft.net>2017-06-15 17:31:37 +0200
committerDavid S. Miller <davem@davemloft.net>2017-06-15 17:59:32 +0200
commit0ddead90b223faae475f3296a50bf574b7f7c69a (patch)
treee729c7fcdc7e3697f7fae2f3028ed0d11931c425 /include/acpi/actbl.h
parentrxrpc: Cache the congestion window setting (diff)
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff)
downloadlinux-0ddead90b223faae475f3296a50bf574b7f7c69a.tar.xz
linux-0ddead90b223faae475f3296a50bf574b7f7c69a.zip
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
The conflicts were two cases of overlapping changes in batman-adv and the qed driver. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/acpi/actbl.h')
-rw-r--r--include/acpi/actbl.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index d92543f3bbfd..bdc55c0da19c 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -374,6 +374,20 @@ struct acpi_table_desc {
u16 validation_count;
};
+/*
+ * Maximum value of the validation_count field in struct acpi_table_desc.
+ * When reached, validation_count cannot be changed any more and the table will
+ * be permanently regarded as validated.
+ *
+ * This is to prevent situations in which unbalanced table get/put operations
+ * may cause premature table unmapping in the OS to happen.
+ *
+ * The maximum validation count can be defined to any value, but should be
+ * greater than the maximum number of OS early stage mapping slots to avoid
+ * leaking early stage table mappings to the late stage.
+ */
+#define ACPI_MAX_TABLE_VALIDATIONS ACPI_UINT16_MAX
+
/* Masks for Flags field above */
#define ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL (0) /* Virtual address, external maintained */