[XEN PATCH 1/7] xen: add declarations for variables where needed

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

Some variables with external linkage used in C code do not have
a visible declaration where they are defined. Providing such
declaration also resolves violations of MISRA C:2012 Rule 8.4.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
 xen/arch/arm/include/asm/setup.h  |  3 +++
 xen/arch/arm/include/asm/smp.h    |  3 +++
 xen/arch/x86/cpu/mcheck/mce.c     |  6 +++---
 xen/arch/x86/include/asm/setup.h  |  3 +++
 xen/arch/x86/irq.c                |  2 +-
 xen/arch/x86/platform_hypercall.c |  3 ---
 xen/common/symbols.c              | 17 -----------------
 xen/include/xen/hypercall.h       |  3 +++
 xen/include/xen/symbols.h         | 18 ++++++++++++++++++
 9 files changed, 34 insertions(+), 24 deletions(-)

diff --git a/xen/arch/arm/include/asm/setup.h b/xen/arch/arm/include/asm/setup.h
index b8866c20f462..8806a74b216d 100644
--- a/xen/arch/arm/include/asm/setup.h
+++ b/xen/arch/arm/include/asm/setup.h
@@ -183,9 +183,12 @@ int map_range_to_domain(const struct dt_device_node *dev,
 extern lpae_t boot_pgtable[XEN_PT_LPAE_ENTRIES];
 
 #ifdef CONFIG_ARM_64
+extern lpae_t boot_first[XEN_PT_LPAE_ENTRIES];
 extern lpae_t boot_first_id[XEN_PT_LPAE_ENTRIES];
 #endif
+extern lpae_t boot_second[XEN_PT_LPAE_ENTRIES];
 extern lpae_t boot_second_id[XEN_PT_LPAE_ENTRIES];
+extern lpae_t boot_third[XEN_PT_LPAE_ENTRIES * XEN_NR_ENTRIES(2)];
 extern lpae_t boot_third_id[XEN_PT_LPAE_ENTRIES];
 
 /* Find where Xen will be residing at runtime and return a PT entry */
diff --git a/xen/arch/arm/include/asm/smp.h b/xen/arch/arm/include/asm/smp.h
index 4fabdf5310d8..28bf24a01d95 100644
--- a/xen/arch/arm/include/asm/smp.h
+++ b/xen/arch/arm/include/asm/smp.h
@@ -6,6 +6,9 @@
 #include <asm/current.h>
 #endif
 
+extern struct init_info init_data;
+extern unsigned long smp_up_cpu;
+
 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_mask);
 DECLARE_PER_CPU(cpumask_var_t, cpu_core_mask);
 
diff --git a/xen/arch/x86/cpu/mcheck/mce.c b/xen/arch/x86/cpu/mcheck/mce.c
index 6141b7eb9cf1..e855f958030d 100644
--- a/xen/arch/x86/cpu/mcheck/mce.c
+++ b/xen/arch/x86/cpu/mcheck/mce.c
@@ -1682,13 +1682,13 @@ long do_mca(XEN_GUEST_HANDLE_PARAM(xen_mc_t) u_xen_mc)
     return ret;
 }
 
-int mcinfo_dumpped;
+static int mcinfo_dumped;
 static int cf_check x86_mcinfo_dump_panic(mctelem_cookie_t mctc)
 {
     struct mc_info *mcip = mctelem_dataptr(mctc);
 
     x86_mcinfo_dump(mcip);
-    mcinfo_dumpped++;
+    mcinfo_dumped++;
 
     return 0;
 }
@@ -1702,7 +1702,7 @@ static void mc_panic_dump(void)
     for_each_online_cpu(cpu)
         mctelem_process_deferred(cpu, x86_mcinfo_dump_panic,
                                  mctelem_has_deferred_lmce(cpu));
-    dprintk(XENLOG_ERR, "End dump mc_info, %x mcinfo dumped\n", 
mcinfo_dumpped);
+    dprintk(XENLOG_ERR, "End dump mc_info, %x mcinfo dumped\n", mcinfo_dumped);
 }
 
 void mc_panic(const char *s)
diff --git a/xen/arch/x86/include/asm/setup.h b/xen/arch/x86/include/asm/setup.h
index dfdd9e555149..3c27fe915ed4 100644
--- a/xen/arch/x86/include/asm/setup.h
+++ b/xen/arch/x86/include/asm/setup.h
@@ -13,8 +13,11 @@ extern char __2M_rwdata_start[], __2M_rwdata_end[];
 extern unsigned long xenheap_initial_phys_start;
 extern uint64_t boot_tsc_stamp;
 
+extern char cpu0_stack[STACK_SIZE];
 extern void *stack_start;
 
+extern unsigned long cr4_pv32_mask;
+
 void early_cpu_init(void);
 void early_time_init(void);
 
diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index 6abfd8162120..604dba94b052 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -43,7 +43,7 @@ int __read_mostly opt_irq_vector_map = 
OPT_IRQ_VECTOR_MAP_DEFAULT;
 static unsigned char __read_mostly irq_max_guests;
 integer_param("irq-max-guests", irq_max_guests);
 
-vmask_t global_used_vector_map;
+static vmask_t global_used_vector_map;
 
 struct irq_desc __read_mostly *irq_desc = NULL;
 
diff --git a/xen/arch/x86/platform_hypercall.c 
b/xen/arch/x86/platform_hypercall.c
index 9469de9045c7..e4dbec73d784 100644
--- a/xen/arch/x86/platform_hypercall.c
+++ b/xen/arch/x86/platform_hypercall.c
@@ -36,9 +36,6 @@
 #include "cpu/mtrr/mtrr.h"
 #include <xsm/xsm.h>
 
-/* Declarations for items shared with the compat mode handler. */
-extern spinlock_t xenpf_lock;
-
 #define RESOURCE_ACCESS_MAX_ENTRIES 3
 struct resource_access {
     unsigned int nr_done;
diff --git a/xen/common/symbols.c b/xen/common/symbols.c
index 691e61792506..7c3514c65f2e 100644
--- a/xen/common/symbols.c
+++ b/xen/common/symbols.c
@@ -21,23 +21,6 @@
 #include <xen/guest_access.h>
 #include <xen/errno.h>
 
-#ifdef SYMBOLS_ORIGIN
-extern const unsigned int symbols_offsets[];
-#define symbols_address(n) (SYMBOLS_ORIGIN + symbols_offsets[n])
-#else
-extern const unsigned long symbols_addresses[];
-#define symbols_address(n) symbols_addresses[n]
-#endif
-extern const unsigned int symbols_num_syms;
-extern const u8 symbols_names[];
-
-extern const struct symbol_offset symbols_sorted_offsets[];
-
-extern const u8 symbols_token_table[];
-extern const u16 symbols_token_index[];
-
-extern const unsigned int symbols_markers[];
-
 /* expand a compressed symbol data into the resulting uncompressed string,
    given the offset to where the symbol is in the compressed stream */
 static unsigned int symbols_expand_symbol(unsigned int off, char *result)
diff --git a/xen/include/xen/hypercall.h b/xen/include/xen/hypercall.h
index f307dfb59760..12de5a69b5b1 100644
--- a/xen/include/xen/hypercall.h
+++ b/xen/include/xen/hypercall.h
@@ -24,6 +24,9 @@
 /* Needs to be after asm/hypercall.h. */
 #include <xen/hypercall-defs.h>
 
+/* Declarations for items shared with the compat mode handler. */
+extern spinlock_t xenpf_lock;
+
 extern long
 arch_do_domctl(
     struct xen_domctl *domctl, struct domain *d,
diff --git a/xen/include/xen/symbols.h b/xen/include/xen/symbols.h
index 20bbb28ef226..92540409265e 100644
--- a/xen/include/xen/symbols.h
+++ b/xen/include/xen/symbols.h
@@ -33,4 +33,22 @@ struct symbol_offset {
     uint32_t stream; /* .. in the compressed stream.*/
     uint32_t addr;   /* .. and in the fixed size address array. */
 };
+
+#ifdef SYMBOLS_ORIGIN
+extern const unsigned int symbols_offsets[];
+#define symbols_address(n) (SYMBOLS_ORIGIN + symbols_offsets[n])
+#else
+extern const unsigned long symbols_addresses[];
+#define symbols_address(n) symbols_addresses[n]
+#endif
+extern const unsigned int symbols_num_syms;
+extern const u8 symbols_names[];
+
+extern const struct symbol_offset symbols_sorted_offsets[];
+
+extern const u8 symbols_token_table[];
+extern const u16 symbols_token_index[];
+
+extern const unsigned int symbols_markers[];
+
 #endif /*_XEN_SYMBOLS_H*/
-- 
2.34.1