[PATCH 00/20] mips: address -Wmissing-prototypes warnings

[PATCH 00/20] mips: address -Wmissing-prototypes warnings

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

As promised, I've now addressed the -Wmissing-prototypes warnings that
showed up in mips as the last major architecture after my patch to
enable the option everywhere.

This should result in a clean build for the defconfig and allmodconfig
builds, but the older platforms that are not yet converted to
CONFFIG_MIPS_GENERIC_KERNEL tend to still have some remaining warnings
in platform specific code that someone needs to address.

The patches could either go through Thomas's mips tree, or
alternatively through linux-mm along with the hexagon patches
that Andrew has already merged.

      Arnd

Link: https://lore.kernel.org/lkml/ebb5b1a2-ed27-4a77-b62b-1d3f19bddd85@app.fastmail.com/
Cc: "Andrew Morton" <akpm@linux-foundation.org>
Cc: "Stephen Rothwell" <sfr@rothwell.id.au>
Cc: "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
Cc: "Thomas Bogendoerfer" <tsbogend@alpha.franken.de>,
Cc: linux-mips@vger.kernel.org

Arnd Bergmann (20):
  mips: decompress: fix add missing prototypes
  mips: add asm/syscalls.h header
  mips: add missing declarations for trap handlers
  mips: rs870e: stop exporting local functions
  mips: signal: move sigcontext declarations to header
  mips: mark local function static if possible
  mips: move build_tlb_refill_handler() prototype
  mips: move jump_label_apply_nops() declaration to header
  mips: unhide uasm_in_compat_space_p() declaration
  mips: fix setup_zero_pages() prototype
  mips: fix tlb_init() prototype
  mips: move cache declarations into header
  mips: add missing declarations
  mips: spram: fix missing prototype warning for spram_config
  mips: mt: include asm/mips_mt.h
  mips: remove extraneous asm-generic/iomap.h include
  mips: suspend: include linux/suspend.h as needed
  mips: hide conditionally unused functions
  mips: smp: fix setup_profiling_timer() prototype
  mips: kexec: include linux/reboot.h

 arch/mips/boot/compressed/dbg.c               |  2 ++
 arch/mips/boot/compressed/decompress.c        | 16 ++-------
 arch/mips/boot/compressed/decompress.h        | 24 ++++++++++++++
 arch/mips/boot/compressed/string.c            |  1 +
 arch/mips/include/asm/cache.h                 |  6 ++++
 arch/mips/include/asm/io.h                    |  2 --
 arch/mips/include/asm/jump_label.h            |  3 ++
 .../mips/include/asm/mach-loongson64/mmzone.h |  1 -
 arch/mips/include/asm/mmzone.h                |  2 ++
 arch/mips/include/asm/processor.h             |  2 ++
 arch/mips/include/asm/r4kcache.h              |  4 +++
 arch/mips/include/asm/setup.h                 |  1 +
 arch/mips/include/asm/signal.h                |  1 +
 arch/mips/include/asm/smp.h                   |  2 ++
 arch/mips/include/asm/spram.h                 |  2 +-
 arch/mips/include/asm/syscalls.h              | 33 +++++++++++++++++++
 arch/mips/include/asm/tlbex.h                 |  1 +
 arch/mips/include/asm/traps.h                 | 23 +++++++++++++
 arch/mips/include/asm/uasm.h                  |  2 --
 arch/mips/kernel/cpu-probe.c                  |  1 -
 arch/mips/kernel/cpu-r3k-probe.c              |  1 -
 arch/mips/kernel/linux32.c                    |  1 +
 arch/mips/kernel/machine_kexec.c              |  1 +
 arch/mips/kernel/mips-cm.c                    |  2 +-
 arch/mips/kernel/mips-mt-fpaff.c              |  1 +
 arch/mips/kernel/mips-mt.c                    |  1 +
 arch/mips/kernel/module.c                     |  3 +-
 arch/mips/kernel/r4k-bugs64.c                 |  1 +
 arch/mips/kernel/signal-common.h              |  3 ++
 arch/mips/kernel/signal.c                     |  1 +
 arch/mips/kernel/signal32.c                   |  1 +
 arch/mips/kernel/signal_n32.c                 |  4 +--
 arch/mips/kernel/signal_o32.c                 |  1 +
 arch/mips/kernel/smp.c                        |  3 ++
 arch/mips/kernel/spram.c                      |  1 +
 arch/mips/kernel/syscall.c                    |  1 +
 arch/mips/kernel/traps.c                      |  2 --
 arch/mips/kernel/unaligned.c                  |  1 +
 arch/mips/mm/c-r4k.c                          |  6 +---
 arch/mips/mm/cache.c                          |  6 ----
 arch/mips/mm/fault.c                          |  1 +
 arch/mips/mm/init.c                           |  1 +
 arch/mips/mm/pgtable-64.c                     |  2 ++
 arch/mips/mm/tlb-r3k.c                        |  4 +--
 arch/mips/mm/tlb-r4k.c                        |  6 ++--
 arch/mips/power/cpu.c                         |  1 +
 arch/mips/power/hibernate.c                   |  1 +
 drivers/platform/mips/rs780e-acpi.c           | 12 +++----
 48 files changed, 145 insertions(+), 53 deletions(-)
 create mode 100644 arch/mips/boot/compressed/decompress.h
 create mode 100644 arch/mips/include/asm/syscalls.h

-- 
2.39.2

[PATCH 01/20] mips: decompress: fix add missing prototypes

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The mips decompressor has some string functions defined locally that are not
declared in the right place:

arch/mips/boot/compressed/dbg.c:12:13: error: no previous prototype for 'putc' [-Werror=missing-prototypes]
arch/mips/boot/compressed/dbg.c:16:6: error: no previous prototype for 'puts' [-Werror=missing-prototypes]
arch/mips/boot/compressed/dbg.c:26:6: error: no previous prototype for 'puthex' [-Werror=missing-prototypes]
arch/mips/boot/compressed/string.c:11:7: error: no previous prototype for 'memcpy' [-Werror=missing-prototypes]
arch/mips/boot/compressed/string.c:22:7: error: no previous prototype for 'memset' [-Werror=missing-prototypes]
arch/mips/boot/compressed/string.c:32:15: error: no previous prototype for 'memmove' [-Werror=missing-prototypes]
arch/mips/boot/compressed/decompress.c:43:6: error: no previous prototype for 'error' [-Werror=missing-prototypes]
arch/mips/boot/compressed/decompress.c:91:6: error: no previous prototype for 'decompress_kernel' [-Werror=missing-prototypes]

Include the string.h header where needed and add a decompress.h header to
have shared prototypes for the rest.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/boot/compressed/dbg.c        |  2 ++
 arch/mips/boot/compressed/decompress.c | 16 ++--------------
 arch/mips/boot/compressed/decompress.h | 24 ++++++++++++++++++++++++
 arch/mips/boot/compressed/string.c     |  1 +
 4 files changed, 29 insertions(+), 14 deletions(-)
 create mode 100644 arch/mips/boot/compressed/decompress.h

diff --git a/arch/mips/boot/compressed/dbg.c b/arch/mips/boot/compressed/dbg.c
index f6728a8fd1c3..2f1ac38fe1cc 100644
--- a/arch/mips/boot/compressed/dbg.c
+++ b/arch/mips/boot/compressed/dbg.c
@@ -9,6 +9,8 @@
 #include <linux/compiler.h>
 #include <linux/types.h>
 
+#include "decompress.h"
+
 void __weak putc(char c)
 {
 }
diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c
index c5dd415254d3..adb6d5b0e6eb 100644
--- a/arch/mips/boot/compressed/decompress.c
+++ b/arch/mips/boot/compressed/decompress.c
@@ -19,6 +19,8 @@
 #include <asm/unaligned.h>
 #include <asm-generic/vmlinux.lds.h>
 
+#include "decompress.h"
+
 /*
  * These two variables specify the free mem region
  * that can be used for temporary malloc area
@@ -26,20 +28,6 @@
 unsigned long free_mem_ptr;
 unsigned long free_mem_end_ptr;
 
-/* The linker tells us where the image is. */
-extern unsigned char __image_begin[], __image_end[];
-
-/* debug interfaces  */
-#ifdef CONFIG_DEBUG_ZBOOT
-extern void puts(const char *s);
-extern void puthex(unsigned long long val);
-#else
-#define puts(s) do {} while (0)
-#define puthex(val) do {} while (0)
-#endif
-
-extern char __appended_dtb[];
-
 void error(char *x)
 {
 	puts("\n\n");
diff --git a/arch/mips/boot/compressed/decompress.h b/arch/mips/boot/compressed/decompress.h
new file mode 100644
index 000000000000..073b64593b3d
--- /dev/null
+++ b/arch/mips/boot/compressed/decompress.h
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef _DECOMPRESSOR_H
+#define _DECOMPRESSOR_H
+
+/* The linker tells us where the image is. */
+extern unsigned char __image_begin[], __image_end[];
+
+/* debug interfaces  */
+#ifdef CONFIG_DEBUG_ZBOOT
+extern void putc(char c);
+extern void puts(const char *s);
+extern void puthex(unsigned long long val);
+#else
+#define putc(s) do {} while (0)
+#define puts(s) do {} while (0)
+#define puthex(val) do {} while (0)
+#endif
+
+extern char __appended_dtb[];
+
+void error(char *x);
+void decompress_kernel(unsigned long boot_heap_start);
+
+#endif
diff --git a/arch/mips/boot/compressed/string.c b/arch/mips/boot/compressed/string.c
index 0b593b709228..f0eb251e44e5 100644
--- a/arch/mips/boot/compressed/string.c
+++ b/arch/mips/boot/compressed/string.c
@@ -7,6 +7,7 @@
 
 #include <linux/compiler_attributes.h>
 #include <linux/types.h>
+#include <asm/string.h>
 
 void *memcpy(void *dest, const void *src, size_t n)
 {
-- 
2.39.2

[PATCH 02/20] mips: add asm/syscalls.h header

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

System call prototypes are generally in linux/syscalls.h, but there are
a couple of mips specific entry points that are missing there:

arch/mips/kernel/signal.c:636:17: error: no previous prototype for 'sys_sigreturn' [-Werror=missing-prototypes]
arch/mips/kernel/signal.c:673:17: error: no previous prototype for 'sys_rt_sigreturn' [-Werror=missing-prototypes]
arch/mips/kernel/syscall.c:51:16: error: no previous prototype for 'sysm_pipe' [-Werror=missing-prototypes]
arch/mips/kernel/mips-mt-fpaff.c:65:17: error: no previous prototype for 'mipsmt_sys_sched_setaffinity' [-Werror=missing-prototypes]
arch/mips/kernel/mips-mt-fpaff.c:157:17: error: no previous prototype for 'mipsmt_sys_sched_getaffinity' [-Werror=missing-prototypes]

Add these to a new asm/syscalls.h as we have in other architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/syscalls.h | 33 ++++++++++++++++++++++++++++++++
 arch/mips/kernel/linux32.c       |  1 +
 arch/mips/kernel/mips-mt-fpaff.c |  1 +
 arch/mips/kernel/signal.c        |  1 +
 arch/mips/kernel/signal32.c      |  1 +
 arch/mips/kernel/signal_n32.c    |  1 +
 arch/mips/kernel/signal_o32.c    |  1 +
 arch/mips/kernel/syscall.c       |  1 +
 8 files changed, 40 insertions(+)
 create mode 100644 arch/mips/include/asm/syscalls.h

diff --git a/arch/mips/include/asm/syscalls.h b/arch/mips/include/asm/syscalls.h
new file mode 100644
index 000000000000..59f9c0c9fa0a
--- /dev/null
+++ b/arch/mips/include/asm/syscalls.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_MIPS_SYSCALLS_H
+#define _ASM_MIPS_SYSCALLS_H
+
+#include <linux/linkage.h>
+#include <linux/compat.h>
+
+asmlinkage void sys_sigreturn(void);
+asmlinkage void sys_rt_sigreturn(void);
+asmlinkage int sysm_pipe(void);
+asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
+                                     unsigned long __user *user_mask_ptr);
+asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
+                                     unsigned long __user *user_mask_ptr);
+asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
+				unsigned offset_a3, unsigned len_a4,
+				unsigned len_a5);
+asmlinkage long sys32_fadvise64_64(int fd, int __pad,
+				   unsigned long a2, unsigned long a3,
+				   unsigned long a4, unsigned long a5,
+				   int flags);
+asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
+				   size_t count);
+asmlinkage long sys32_sync_file_range(int fd, int __pad,
+				      unsigned long a2, unsigned long a3,
+				      unsigned long a4, unsigned long a5,
+				      int flags);
+asmlinkage void sys32_rt_sigreturn(void);
+asmlinkage void sys32_sigreturn(void);
+asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset);
+asmlinkage void sysn32_rt_sigreturn(void);
+
+#endif
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 6b61be486303..a0c0a7a654e9 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -42,6 +42,7 @@
 #include <linux/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/mman.h>
+#include <asm/syscalls.h>
 
 #ifdef __MIPSEB__
 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
diff --git a/arch/mips/kernel/mips-mt-fpaff.c b/arch/mips/kernel/mips-mt-fpaff.c
index 67e130d3f038..10172fc4f627 100644
--- a/arch/mips/kernel/mips-mt-fpaff.c
+++ b/arch/mips/kernel/mips-mt-fpaff.c
@@ -15,6 +15,7 @@
 #include <linux/security.h>
 #include <linux/types.h>
 #include <linux/uaccess.h>
+#include <asm/syscalls.h>
 
 /*
  * CPU mask used to set process affinity for MT VPEs/TCs with FPUs
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 479999b7f2de..ccbf580827f6 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -38,6 +38,7 @@
 #include <asm/dsp.h>
 #include <asm/inst.h>
 #include <asm/msa.h>
+#include <asm/syscalls.h>
 
 #include "signal-common.h"
 
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 59b8965433c2..73081d4ee8c1 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -18,6 +18,7 @@
 #include <asm/compat-signal.h>
 #include <linux/uaccess.h>
 #include <asm/unistd.h>
+#include <asm/syscalls.h>
 
 #include "signal-common.h"
 
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index cfc77b69420a..ff2043d620ba 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -24,6 +24,7 @@
 #include <asm/ucontext.h>
 #include <asm/fpu.h>
 #include <asm/cpu-features.h>
+#include <asm/syscalls.h>
 
 #include "signal-common.h"
 
diff --git a/arch/mips/kernel/signal_o32.c b/arch/mips/kernel/signal_o32.c
index 299a7a28ca33..4f0458459650 100644
--- a/arch/mips/kernel/signal_o32.c
+++ b/arch/mips/kernel/signal_o32.c
@@ -19,6 +19,7 @@
 #include <asm/dsp.h>
 #include <asm/sim.h>
 #include <asm/unistd.h>
+#include <asm/syscalls.h>
 
 #include "signal-common.h"
 
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index ae93a607ddf7..1bfc34a2e5b3 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -39,6 +39,7 @@
 #include <asm/shmparam.h>
 #include <asm/sync.h>
 #include <asm/sysmips.h>
+#include <asm/syscalls.h>
 #include <asm/switch_to.h>
 
 /*
-- 
2.39.2

[PATCH 03/20] mips: add missing declarations for trap handlers

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

These exception handlers are all called from assembly code, so they don't
normally need a declaration, but without one we now get warnings:

arch/mips/mm/fault.c:323:17: error: no previous prototype for 'do_page_fault' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:447:17: error: no previous prototype for 'do_be' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:752:17: error: no previous prototype for 'do_ov' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:874:17: error: no previous prototype for 'do_fpe' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1027:17: error: no previous prototype for 'do_bp' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1114:17: error: no previous prototype for 'do_tr' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1151:17: error: no previous prototype for 'do_ri' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1402:17: error: no previous prototype for 'do_cpu' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1507:17: error: no previous prototype for 'do_msa_fpe' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1527:17: error: no previous prototype for 'do_msa' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1548:17: error: no previous prototype for 'do_mdmx' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1560:17: error: no previous prototype for 'do_watch' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1587:17: error: no previous prototype for 'do_mcheck' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1612:17: error: no previous prototype for 'do_mt' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1648:17: error: no previous prototype for 'do_dsp' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1656:17: error: no previous prototype for 'do_reserved' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1832:17: error: no previous prototype for 'cache_parity_error' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1880:17: error: no previous prototype for 'do_ftlb' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1909:17: error: no previous prototype for 'do_gsexc' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1944:6: error: no previous prototype for 'ejtag_exception_handler' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:1989:17: error: no previous prototype for 'nmi_exception_handler' [-Werror=missing-prototypes]
arch/mips/kernel/unaligned.c:1516:17: error: no previous prototype for 'do_ade' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/traps.h | 23 +++++++++++++++++++++++
 arch/mips/kernel/r4k-bugs64.c |  1 +
 arch/mips/kernel/unaligned.c  |  1 +
 arch/mips/mm/fault.c          |  1 +
 4 files changed, 26 insertions(+)

diff --git a/arch/mips/include/asm/traps.h b/arch/mips/include/asm/traps.h
index d4d9f8a8fdea..1e63d7d04404 100644
--- a/arch/mips/include/asm/traps.h
+++ b/arch/mips/include/asm/traps.h
@@ -41,5 +41,28 @@ extern char except_vec_nmi[];
 
 asmlinkage void do_page_fault(struct pt_regs *regs,
 	unsigned long write, unsigned long address);
+asmlinkage void do_ade(struct pt_regs *regs);
+asmlinkage void do_be(struct pt_regs *regs);
+asmlinkage void do_ov(struct pt_regs *regs);
+asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31);
+asmlinkage void do_bp(struct pt_regs *regs);
+asmlinkage void do_tr(struct pt_regs *regs);
+asmlinkage void do_ri(struct pt_regs *regs);
+asmlinkage void do_cpu(struct pt_regs *regs);
+asmlinkage void do_msa_fpe(struct pt_regs *regs, unsigned int msacsr);
+asmlinkage void do_msa(struct pt_regs *regs);
+asmlinkage void do_mdmx(struct pt_regs *regs);
+asmlinkage void do_watch(struct pt_regs *regs);
+asmlinkage void do_mcheck(struct pt_regs *regs);
+asmlinkage void do_mt(struct pt_regs *regs);
+asmlinkage void do_dsp(struct pt_regs *regs);
+asmlinkage void do_reserved(struct pt_regs *regs);
+asmlinkage void do_ftlb(void);
+asmlinkage void do_gsexc(struct pt_regs *regs, u32 diag1);
+asmlinkage void do_daddi_ov(struct pt_regs *regs);
+
+asmlinkage void cache_parity_error(void);
+asmlinkage void ejtag_exception_handler(struct pt_regs *regs);
+asmlinkage void __noreturn nmi_exception_handler(struct pt_regs *regs);
 
 #endif /* _ASM_TRAPS_H */
diff --git a/arch/mips/kernel/r4k-bugs64.c b/arch/mips/kernel/r4k-bugs64.c
index 6ffefb2c6971..1e300330078d 100644
--- a/arch/mips/kernel/r4k-bugs64.c
+++ b/arch/mips/kernel/r4k-bugs64.c
@@ -14,6 +14,7 @@
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
 #include <asm/setup.h>
+#include <asm/traps.h>
 
 static char bug64hit[] __initdata =
 	"reliable operation impossible!\n%s";
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index f4cf94e92ec3..db652c99b72e 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -91,6 +91,7 @@
 #include <asm/inst.h>
 #include <asm/unaligned-emul.h>
 #include <asm/mmu_context.h>
+#include <asm/traps.h>
 #include <linux/uaccess.h>
 
 #include "access-helper.h"
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index d7878208bd3f..aaa9a242ebba 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -26,6 +26,7 @@
 #include <asm/mmu_context.h>
 #include <asm/ptrace.h>
 #include <asm/highmem.h>		/* For VMALLOC_END */
+#include <asm/traps.h>
 #include <linux/kdebug.h>
 
 int show_unhandled_signals = 1;
-- 
2.39.2

[PATCH 04/20] mips: rs870e: stop exporting local functions

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

These four functions are exported, but don't have any users, and no prototypes,
which now causes warnings:

drivers/platform/mips/rs780e-acpi.c:35:6: error: no previous prototype for 'pm_iowrite' [-Werror=missing-prototypes]
drivers/platform/mips/rs780e-acpi.c:41:4: error: no previous prototype for 'pm_ioread' [-Werror=missing-prototypes]
drivers/platform/mips/rs780e-acpi.c:47:6: error: no previous prototype for 'pm2_iowrite' [-Werror=missing-prototypes]
drivers/platform/mips/rs780e-acpi.c:53:4: error: no previous prototype for 'pm2_ioread' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/platform/mips/rs780e-acpi.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/mips/rs780e-acpi.c b/drivers/platform/mips/rs780e-acpi.c
index bb0e8ae0eefd..5b8f9cc32589 100644
--- a/drivers/platform/mips/rs780e-acpi.c
+++ b/drivers/platform/mips/rs780e-acpi.c
@@ -32,29 +32,25 @@ static u8 pmio_read_index(u16 index, u8 reg)
 	return inb(index + 1);
 }
 
-void pm_iowrite(u8 reg, u8 value)
+static void pm_iowrite(u8 reg, u8 value)
 {
 	pmio_write_index(PM_INDEX, reg, value);
 }
-EXPORT_SYMBOL(pm_iowrite);
 
-u8 pm_ioread(u8 reg)
+static u8 pm_ioread(u8 reg)
 {
 	return pmio_read_index(PM_INDEX, reg);
 }
-EXPORT_SYMBOL(pm_ioread);
 
-void pm2_iowrite(u8 reg, u8 value)
+static void pm2_iowrite(u8 reg, u8 value)
 {
 	pmio_write_index(PM2_INDEX, reg, value);
 }
-EXPORT_SYMBOL(pm2_iowrite);
 
-u8 pm2_ioread(u8 reg)
+static u8 pm2_ioread(u8 reg)
 {
 	return pmio_read_index(PM2_INDEX, reg);
 }
-EXPORT_SYMBOL(pm2_ioread);
 
 static void acpi_hw_clear_status(void)
 {
-- 
2.39.2

[PATCH 05/20] mips: signal: move sigcontext declarations to header

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Function declarations should be in a shared header to ensure the prototypes
match the definition:

arch/mips/kernel/signal.c:439:5: error: no previous prototype for 'setup_sigcontext' [-Werror=missing-prototypes]
arch/mips/kernel/signal.c:516:5: error: no previous prototype for 'restore_sigcontext' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/kernel/signal-common.h | 3 +++
 arch/mips/kernel/signal_n32.c    | 3 ---
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index f50d48435c68..136eb20ac024 100644
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -40,4 +40,7 @@ _restore_fp_context(void __user *fpregs, void __user *csr);
 extern asmlinkage int _save_msa_all_upper(void __user *buf);
 extern asmlinkage int _restore_msa_all_upper(void __user *buf);
 
+extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
+extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
+
 #endif	/* __SIGNAL_COMMON_H */
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index ff2043d620ba..139d2596b0d4 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -33,9 +33,6 @@
  */
 #define __NR_N32_restart_syscall	6214
 
-extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
-extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
-
 struct ucontextn32 {
 	u32		    uc_flags;
 	s32		    uc_link;
-- 
2.39.2

[PATCH 06/20] mips: mark local function static if possible

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

These two functions are global but have no extern prototypes or other
callers, so it's best to mark them as static, avoiding these warnings:

arch/mips/kernel/mips-cm.c:204:13: error: no previous prototype for '__mips_cm_l2sync_phys_base' [-Werror=missing-prototypes]
arch/mips/mm/c-r4k.c:1827:12: error: no previous prototype for 'r4k_cache_init_pm' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/kernel/mips-cm.c | 2 +-
 arch/mips/mm/c-r4k.c       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/mips-cm.c b/arch/mips/kernel/mips-cm.c
index 3f00788b0871..84b3affb9de8 100644
--- a/arch/mips/kernel/mips-cm.c
+++ b/arch/mips/kernel/mips-cm.c
@@ -201,7 +201,7 @@ phys_addr_t __mips_cm_phys_base(void)
 phys_addr_t mips_cm_phys_base(void)
 	__attribute__((weak, alias("__mips_cm_phys_base")));
 
-phys_addr_t __mips_cm_l2sync_phys_base(void)
+static phys_addr_t __mips_cm_l2sync_phys_base(void)
 {
 	u32 base_reg;
 
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 187d1c16361c..0619e5296ff3 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1828,7 +1828,7 @@ static struct notifier_block r4k_cache_pm_notifier_block = {
 	.notifier_call = r4k_cache_pm_notifier,
 };
 
-int __init r4k_cache_init_pm(void)
+static int __init r4k_cache_init_pm(void)
 {
 	return cpu_pm_register_notifier(&r4k_cache_pm_notifier_block);
 }
-- 
2.39.2

[PATCH 07/20] mips: move build_tlb_refill_handler() prototype

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Instead of having a declaration for each caller, have one that is shared
with the function definition, which avoids a warning:

arch/mips/mm/tlbex.c:2547:6: error: no previous prototype for 'build_tlb_refill_handler' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/tlbex.h | 1 +
 arch/mips/mm/tlb-r3k.c        | 3 +--
 arch/mips/mm/tlb-r4k.c        | 3 +--
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/mips/include/asm/tlbex.h b/arch/mips/include/asm/tlbex.h
index 6d97e23f30ab..24a2d06cc1c3 100644
--- a/arch/mips/include/asm/tlbex.h
+++ b/arch/mips/include/asm/tlbex.h
@@ -23,6 +23,7 @@ void build_update_entries(u32 **p, unsigned int tmp, unsigned int ptep);
 void build_tlb_write_entry(u32 **p, struct uasm_label **l,
 			   struct uasm_reloc **r,
 			   enum tlb_write_entry wmode);
+void build_tlb_refill_handler(void);
 
 extern void handle_tlbl(void);
 extern char handle_tlbl_end[];
diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c
index 53dfa2b9316b..1fb2cf8c8bfa 100644
--- a/arch/mips/mm/tlb-r3k.c
+++ b/arch/mips/mm/tlb-r3k.c
@@ -23,11 +23,10 @@
 #include <asm/io.h>
 #include <asm/bootinfo.h>
 #include <asm/cpu.h>
+#include <asm/tlbex.h>
 
 #undef DEBUG_TLB
 
-extern void build_tlb_refill_handler(void);
-
 /* CP0 hazard avoidance. */
 #define BARRIER				\
 	__asm__ __volatile__(		\
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 93c2d695588a..a542b255019a 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -22,10 +22,9 @@
 #include <asm/hazards.h>
 #include <asm/mmu_context.h>
 #include <asm/tlb.h>
+#include <asm/tlbex.h>
 #include <asm/tlbmisc.h>
 
-extern void build_tlb_refill_handler(void);
-
 /*
  * LOONGSON-2 has a 4 entry itlb which is a subset of jtlb, LOONGSON-3 has
  * a 4 entry itlb and a 4 entry dtlb which are subsets of jtlb. Unfortunately,
-- 
2.39.2

[PATCH 08/20] mips: move jump_label_apply_nops() declaration to header

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Instead of an extern declaration in the C file with the caller, move it
to an appropriate header, avoiding

arch/mips/kernel/jump_label.c:93:6: error: no previous prototype for 'jump_label_apply_nops' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/jump_label.h | 3 +++
 arch/mips/kernel/module.c          | 3 +--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/jump_label.h b/arch/mips/include/asm/jump_label.h
index c5c6864e64bc..081be98c71ef 100644
--- a/arch/mips/include/asm/jump_label.h
+++ b/arch/mips/include/asm/jump_label.h
@@ -15,6 +15,9 @@
 #include <linux/types.h>
 #include <asm/isa-rev.h>
 
+struct module;
+extern void jump_label_apply_nops(struct module *mod);
+
 #define JUMP_LABEL_NOP_SIZE 4
 
 #ifdef CONFIG_64BIT
diff --git a/arch/mips/kernel/module.c b/arch/mips/kernel/module.c
index 0c936cbf20c5..7b2fbaa9cac5 100644
--- a/arch/mips/kernel/module.c
+++ b/arch/mips/kernel/module.c
@@ -20,8 +20,7 @@
 #include <linux/kernel.h>
 #include <linux/spinlock.h>
 #include <linux/jump_label.h>
-
-extern void jump_label_apply_nops(struct module *mod);
+#include <asm/jump_label.h>
 
 struct mips_hi16 {
 	struct mips_hi16 *next;
-- 
2.39.2

[PATCH 09/20] mips: unhide uasm_in_compat_space_p() declaration

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

uasm_in_compat_space_p() has a conditional declaration but is defined
unconditionally because of another local user, which causes a warning:

arch/mips/mm/uasm.c:421:5: error: no previous prototype for 'uasm_in_compat_space_p' [-Werror=missing-prototypes]

Make the declaration unconditional to avoid this.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/uasm.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h
index 296bcf31abb5..b43bfd445252 100644
--- a/arch/mips/include/asm/uasm.h
+++ b/arch/mips/include/asm/uasm.h
@@ -193,9 +193,7 @@ struct uasm_label {
 
 void uasm_build_label(struct uasm_label **lab, u32 *addr,
 			int lid);
-#ifdef CONFIG_64BIT
 int uasm_in_compat_space_p(long addr);
-#endif
 int uasm_rel_hi(long val);
 int uasm_rel_lo(long val);
 void UASM_i_LA_mostly(u32 **buf, unsigned int rs, long addr);
-- 
2.39.2

[PATCH 10/20] mips: fix setup_zero_pages() prototype

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

setup_zero_pages() has a local declaration in a platform specific header,
but that is not seen in the file it is defined in:

arch/mips/mm/init.c:60:6: error: no previous prototype for 'setup_zero_pages' [-Werror=missing-prototypes]

Move it to the corresponding global header and include that where needed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/mach-loongson64/mmzone.h | 1 -
 arch/mips/include/asm/mmzone.h                 | 2 ++
 arch/mips/mm/init.c                            | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/mach-loongson64/mmzone.h b/arch/mips/include/asm/mach-loongson64/mmzone.h
index ebb1deaa77b9..a3d65d37b8b5 100644
--- a/arch/mips/include/asm/mach-loongson64/mmzone.h
+++ b/arch/mips/include/asm/mach-loongson64/mmzone.h
@@ -18,7 +18,6 @@ extern struct pglist_data *__node_data[];
 
 #define NODE_DATA(n)		(__node_data[n])
 
-extern void setup_zero_pages(void);
 extern void __init prom_init_numa_memory(void);
 
 #endif /* _ASM_MACH_MMZONE_H */
diff --git a/arch/mips/include/asm/mmzone.h b/arch/mips/include/asm/mmzone.h
index 602a21aee9d4..14226ea42036 100644
--- a/arch/mips/include/asm/mmzone.h
+++ b/arch/mips/include/asm/mmzone.h
@@ -20,4 +20,6 @@
 #define nid_to_addrbase(nid) 0
 #endif
 
+extern void setup_zero_pages(void);
+
 #endif /* _ASM_MMZONE_H_ */
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 5dcb525a8995..c2e0e5aebe90 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -38,6 +38,7 @@
 #include <asm/dma.h>
 #include <asm/maar.h>
 #include <asm/mmu_context.h>
+#include <asm/mmzone.h>
 #include <asm/sections.h>
 #include <asm/pgalloc.h>
 #include <asm/tlb.h>
-- 
2.39.2

[PATCH 11/20] mips: fix tlb_init() prototype

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

There are two definitions for tlb_init(), but no global declaration:

arch/mips/mm/tlb-r4k.c:552:6: error: no previous prototype for 'tlb_init' [-Werror=missing-prototypes]
arch/mips/mm/tlb-r3k.c:244:6: error: no previous prototype for 'tlb_init' [-Werror=missing-prototypes]

Move the declaration to asm/setup.h and included it as needed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/setup.h | 1 +
 arch/mips/kernel/traps.c      | 2 --
 arch/mips/mm/tlb-r3k.c        | 1 +
 arch/mips/mm/tlb-r4k.c        | 1 +
 4 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/setup.h b/arch/mips/include/asm/setup.h
index 8c56b862fd9c..4dce41138bad 100644
--- a/arch/mips/include/asm/setup.h
+++ b/arch/mips/include/asm/setup.h
@@ -27,5 +27,6 @@ extern unsigned long ebase;
 extern unsigned int hwrena;
 extern void per_cpu_trap_init(bool);
 extern void cpu_cache_init(void);
+extern void tlb_init(void);
 
 #endif /* __SETUP_H */
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 246c6a6b0261..c58c0c3c5b40 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -2157,8 +2157,6 @@ void *set_vi_handler(int n, vi_handler_t addr)
 	return set_vi_srs_handler(n, addr, 0);
 }
 
-extern void tlb_init(void);
-
 /*
  * Timer interrupt
  */
diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c
index 1fb2cf8c8bfa..f6db65410c65 100644
--- a/arch/mips/mm/tlb-r3k.c
+++ b/arch/mips/mm/tlb-r3k.c
@@ -23,6 +23,7 @@
 #include <asm/io.h>
 #include <asm/bootinfo.h>
 #include <asm/cpu.h>
+#include <asm/setup.h>
 #include <asm/tlbex.h>
 
 #undef DEBUG_TLB
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index a542b255019a..44411b20c7ec 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -24,6 +24,7 @@
 #include <asm/tlb.h>
 #include <asm/tlbex.h>
 #include <asm/tlbmisc.h>
+#include <asm/setup.h>
 
 /*
  * LOONGSON-2 has a 4 entry itlb which is a subset of jtlb, LOONGSON-3 has
-- 
2.39.2

[PATCH 12/20] mips: move cache declarations into header

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Some of the cache functions are declared only for their callers, e.g.

arch/mips/mm/c-r3k.c:28:15: error: no previous prototype for 'r3k_cache_size' [-Werror=missing-prototypes]
arch/mips/mm/c-r3k.c:63:15: error: no previous prototype for 'r3k_cache_lsize' [-Werror=missing-prototypes]
arch/mips/mm/c-r4k.c:1703:6: error: no previous prototype for 'r4k_cache_init' [-Werror=missing-prototypes]
arch/mips/mm/sc-mips.c:255:5: error: no previous prototype for 'mips_sc_init' [-Werror=missing-prototypes]

Move all the declarations to asm/cache.h and asm/r4kcache.h where they
can be seen by the function definitions.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/cache.h    | 6 ++++++
 arch/mips/include/asm/r4kcache.h | 4 ++++
 arch/mips/kernel/cpu-probe.c     | 1 -
 arch/mips/kernel/cpu-r3k-probe.c | 1 -
 arch/mips/mm/c-r4k.c             | 4 ----
 arch/mips/mm/cache.c             | 6 ------
 6 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h
index 3424a7908c0f..8b08db3fb17a 100644
--- a/arch/mips/include/asm/cache.h
+++ b/arch/mips/include/asm/cache.h
@@ -17,5 +17,11 @@
 #define __read_mostly __section(".data..read_mostly")
 
 extern void cache_noop(void);
+extern void r3k_cache_init(void);
+extern unsigned long r3k_cache_size(unsigned long);
+extern unsigned long r3k_cache_lsize(unsigned long);
+extern void r4k_cache_init(void);
+extern void octeon_cache_init(void);
+extern void au1x00_fixup_config_od(void);
 
 #endif /* _ASM_CACHE_H */
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index 431a1c9d53fc..da1cd1bbdbc5 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -24,6 +24,10 @@
 #include <asm/mmzone.h>
 #include <asm/unroll.h>
 
+extern void r5k_sc_init(void);
+extern void rm7k_sc_init(void);
+extern int mips_sc_init(void);
+
 extern void (*r4k_blast_dcache)(void);
 extern void (*r4k_blast_icache)(void);
 
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index b406d8bfb15a..de7460c3a72e 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -179,7 +179,6 @@ void __init check_bugs32(void)
 static inline int cpu_has_confreg(void)
 {
 #ifdef CONFIG_CPU_R3000
-	extern unsigned long r3k_cache_size(unsigned long);
 	unsigned long size1, size2;
 	unsigned long cfg = read_c0_conf();
 
diff --git a/arch/mips/kernel/cpu-r3k-probe.c b/arch/mips/kernel/cpu-r3k-probe.c
index be93469c0e0e..0c826f729f75 100644
--- a/arch/mips/kernel/cpu-r3k-probe.c
+++ b/arch/mips/kernel/cpu-r3k-probe.c
@@ -42,7 +42,6 @@ void __init check_bugs32(void)
 static inline int cpu_has_confreg(void)
 {
 #ifdef CONFIG_CPU_R3000
-	extern unsigned long r3k_cache_size(unsigned long);
 	unsigned long size1, size2;
 	unsigned long cfg = read_c0_conf();
 
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 0619e5296ff3..b45bf026ee55 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1485,10 +1485,6 @@ static void loongson3_sc_init(void)
 	return;
 }
 
-extern int r5k_sc_init(void);
-extern int rm7k_sc_init(void);
-extern int mips_sc_init(void);
-
 static void setup_scache(void)
 {
 	struct cpuinfo_mips *c = &current_cpu_data;
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 7f830634dbe7..e5d19f4a38ba 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -206,19 +206,13 @@ static inline void setup_protection_map(void)
 void cpu_cache_init(void)
 {
 	if (cpu_has_3k_cache) {
-		extern void __weak r3k_cache_init(void);
-
 		r3k_cache_init();
 	}
 	if (cpu_has_4k_cache) {
-		extern void __weak r4k_cache_init(void);
-
 		r4k_cache_init();
 	}
 
 	if (cpu_has_octeon_cache) {
-		extern void __weak octeon_cache_init(void);
-
 		octeon_cache_init();
 	}
 
-- 
2.39.2

[PATCH 13/20] mips: add missing declarations

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

These are three more functions that are only called from assembler and
only need a declaration to avoid the -Wmissing-prototypes warnings:

arch/mips/kernel/signal.c:904:17: error: no previous prototype for 'do_notify_resume' [-Werror=missing-prototypes]
arch/mips/kernel/traps.c:370:6: error: no previous prototype for 'show_registers' [-Werror=missing-prototypes]
arch/mips/kernel/smp.c:352:17: error: no previous prototype for 'start_secondary' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/processor.h | 2 ++
 arch/mips/include/asm/signal.h    | 1 +
 arch/mips/include/asm/smp.h       | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index ae2cd37a38f0..ca7662cc65a7 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -402,4 +402,6 @@ extern int mips_set_process_fp_mode(struct task_struct *task,
 #define GET_FP_MODE(task)		mips_get_process_fp_mode(task)
 #define SET_FP_MODE(task,value)		mips_set_process_fp_mode(task, value)
 
+void show_registers(struct pt_regs *regs);
+
 #endif /* _ASM_PROCESSOR_H */
diff --git a/arch/mips/include/asm/signal.h b/arch/mips/include/asm/signal.h
index 23d6b8015c79..8de81ccef7ad 100644
--- a/arch/mips/include/asm/signal.h
+++ b/arch/mips/include/asm/signal.h
@@ -31,5 +31,6 @@ extern struct mips_abi mips_abi_32;
 
 extern int protected_save_fp_context(void __user *sc);
 extern int protected_restore_fp_context(void __user *sc);
+void do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags);
 
 #endif /* _ASM_SIGNAL_H */
diff --git a/arch/mips/include/asm/smp.h b/arch/mips/include/asm/smp.h
index f3b18b4a5e44..19190e413223 100644
--- a/arch/mips/include/asm/smp.h
+++ b/arch/mips/include/asm/smp.h
@@ -61,6 +61,8 @@ extern asmlinkage void smp_bootstrap(void);
 
 extern void calculate_cpu_foreign_map(void);
 
+asmlinkage void start_secondary(void);
+
 /*
  * this function sends a 'reschedule' IPI to another CPU.
  * it goes straight through and wastes no time serializing
-- 
2.39.2

[PATCH 14/20] mips: spram: fix missing prototype warning for spram_config

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

arch/mips/kernel/spram.c:194:6: error: no previous prototype for 'spram_config' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/spram.h | 2 +-
 arch/mips/kernel/spram.c      | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/spram.h b/arch/mips/include/asm/spram.h
index 373f2a5d495d..9f6a2cb1943a 100644
--- a/arch/mips/include/asm/spram.h
+++ b/arch/mips/include/asm/spram.h
@@ -3,7 +3,7 @@
 #define _MIPS_SPRAM_H
 
 #if defined(CONFIG_MIPS_SPRAM)
-extern __init void spram_config(void);
+extern void spram_config(void);
 #else
 static inline void spram_config(void) { }
 #endif /* CONFIG_MIPS_SPRAM */
diff --git a/arch/mips/kernel/spram.c b/arch/mips/kernel/spram.c
index d5d96214cce5..71c7e5e27567 100644
--- a/arch/mips/kernel/spram.c
+++ b/arch/mips/kernel/spram.c
@@ -12,6 +12,7 @@
 #include <asm/mipsregs.h>
 #include <asm/r4kcache.h>
 #include <asm/hazards.h>
+#include <asm/spram.h>
 
 /*
  * These definitions are correct for the 24K/34K/74K SPRAM sample
-- 
2.39.2

[PATCH 15/20] mips: mt: include asm/mips_mt.h

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

These two functions have a global prototype but the header is not
included before the function definitions:

arch/mips/kernel/mips-mt.c:50:6: error: no previous prototype for 'mips_mt_regdump' [-Werror=missing-prototypes]
arch/mips/kernel/mips-mt.c:159:6: error: no previous prototype for 'mips_mt_set_cpuoptions' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/kernel/mips-mt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index f88b7919f11f..c07d64438b5b 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -19,6 +19,7 @@
 #include <asm/mipsmtregs.h>
 #include <asm/r4kcache.h>
 #include <asm/cacheflush.h>
+#include <asm/mips_mt.h>
 
 int vpelimit;
 
-- 
2.39.2

[PATCH 16/20] mips: remove extraneous asm-generic/iomap.h include

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

When this file is included before defining readq(), it misses the declarations
for a couple of functions that now become unusable:

lib/iomap.c:156:5: warning: no previous prototype for 'ioread64_lo_hi' [-Wmissing-prototypes]
lib/iomap.c:163:5: warning: no previous prototype for 'ioread64_hi_lo' [-Wmissing-prototypes]
lib/iomap.c:170:5: warning: no previous prototype for 'ioread64be_lo_hi' [-Wmissing-prototypes]
lib/iomap.c:178:5: warning: no previous prototype for 'ioread64be_hi_lo' [-Wmissing-prototypes]
lib/iomap.c:264:6: warning: no previous prototype for 'iowrite64_lo_hi' [-Wmissing-prototypes]
lib/iomap.c:272:6: warning: no previous prototype for 'iowrite64_hi_lo' [-Wmissing-prototypes]
lib/iomap.c:280:6: warning: no previous prototype for 'iowrite64be_lo_hi' [-Wmissing-prototypes]
lib/iomap.c:288:6: warning: no previous prototype for 'iowrite64be_hi_lo' [-Wmissing-prototypes]

The file is included again later from asm-generic/io.h, so dropping the initial
include statement makes it do the right thing, both for avoiding the warning
and for actually providing these functions.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/io.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index b0866100baf2..85bbd967e05f 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -187,8 +187,6 @@ void iounmap(const volatile void __iomem *addr);
 #define ioremap_wc(offset, size)					\
 	ioremap_prot((offset), (size), boot_cpu_data.writecombine)
 
-#include <asm-generic/iomap.h>
-
 #if defined(CONFIG_CPU_CAVIUM_OCTEON)
 #define war_io_reorder_wmb()		wmb()
 #else
-- 
2.39.2

[PATCH 17/20] mips: suspend: include linux/suspend.h as needed

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

A couple of functions are defined by the architecture and declared in
linux/suspend.h, but mips is lacking the corresponding #include statement
before the definition:

arch/mips/power/cpu.c:16:6: warning: no previous prototype for 'save_processor_state' [-Wmissing-prototypes]
arch/mips/power/cpu.c:26:6: warning: no previous prototype for 'restore_processor_state' [-Wmissing-prototypes]
arch/mips/power/cpu.c:36:5: warning: no previous prototype for 'pfn_is_nosave' [-Wmissing-prototypes]
arch/mips/power/hibernate.c:6:5: warning: no previous prototype for 'swsusp_arch_resume' [-Wmissing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/power/cpu.c       | 1 +
 arch/mips/power/hibernate.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/mips/power/cpu.c b/arch/mips/power/cpu.c
index a15e29dfc7b3..d8ef7778e535 100644
--- a/arch/mips/power/cpu.c
+++ b/arch/mips/power/cpu.c
@@ -6,6 +6,7 @@
  * Author: Hu Hongbing <huhb@lemote.com>
  *	   Wu Zhangjin <wuzhangjin@gmail.com>
  */
+#include <linux/suspend.h>
 #include <asm/sections.h>
 #include <asm/fpu.h>
 #include <asm/dsp.h>
diff --git a/arch/mips/power/hibernate.c b/arch/mips/power/hibernate.c
index 94ab17c3c49d..192879e76c85 100644
--- a/arch/mips/power/hibernate.c
+++ b/arch/mips/power/hibernate.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/suspend.h>
 #include <asm/tlbflush.h>
 
 extern int restore_image(void);
-- 
2.39.2

[PATCH 18/20] mips: hide conditionally unused functions

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

A couple of functions are defined unconditionally but have a
conditional declaration:

arch/mips/mm/tlb-r4k.c:461:12: error: no previous prototype for 'add_temporary_entry' [-Werror=missing-prototypes]
arch/mips/mm/pgtable-64.c:92:7: error: no previous prototype for 'mk_pmd' [-Werror=missing-prototypes]
arch/mips/mm/pgtable-64.c:101:6: error: no previous prototype for 'set_pmd_at' [-Werror=missing-prototypes]

Since there are no callers in these configurations, add the same #ifdef
checks around the definitions.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/mm/pgtable-64.c | 2 ++
 arch/mips/mm/tlb-r4k.c    | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/mips/mm/pgtable-64.c b/arch/mips/mm/pgtable-64.c
index c76d21f7dffb..1e544827dea9 100644
--- a/arch/mips/mm/pgtable-64.c
+++ b/arch/mips/mm/pgtable-64.c
@@ -89,6 +89,7 @@ void pud_init(void *addr)
 }
 #endif
 
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
 pmd_t mk_pmd(struct page *page, pgprot_t prot)
 {
 	pmd_t pmd;
@@ -103,6 +104,7 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 {
 	*pmdp = pmd;
 }
+#endif
 
 void __init pagetable_init(void)
 {
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 44411b20c7ec..7e2a0011a6fb 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -458,6 +458,7 @@ EXPORT_SYMBOL(has_transparent_hugepage);
 
 int temp_tlb_entry;
 
+#ifndef CONFIG_64BIT
 __init int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1,
 			       unsigned long entryhi, unsigned long pagemask)
 {
@@ -496,6 +497,7 @@ __init int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1,
 	local_irq_restore(flags);
 	return ret;
 }
+#endif
 
 static int ntlb;
 static int __init set_ntlb(char *str)
-- 
2.39.2

[PATCH 19/20] mips: smp: fix setup_profiling_timer() prototype

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The function is unconditionally defined in smp.c but is conditionally
declared in a header that is not included here.

arch/mips/kernel/smp.c:473:5: error: no previous prototype for 'setup_profiling_timer' [-Werror=missing-prototypes]

Add the missing #include and #ifdef to match the declaration.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/kernel/smp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 8fbef537fb88..774e4dcd86d2 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -10,6 +10,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/profile.h>
 #include <linux/smp.h>
 #include <linux/spinlock.h>
 #include <linux/threads.h>
@@ -468,11 +469,13 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 	return 0;
 }
 
+#ifdef CONFIG_PROFILING
 /* Not really SMP stuff ... */
 int setup_profiling_timer(unsigned int multiplier)
 {
 	return 0;
 }
+#endif
 
 static void flush_tlb_all_ipi(void *info)
 {
-- 
2.39.2

[PATCH 20/20] mips: kexec: include linux/reboot.h

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Two functions are provided for kexec, but the mips implementation is
missing the corresponding #include statment:

arch/mips/kernel/machine_kexec.c:136:1: error: no previous prototype for 'machine_shutdown' [-Werror=missing-prototypes]
arch/mips/kernel/machine_kexec.c:152:1: error: no previous prototype for 'machine_crash_shutdown' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/kernel/machine_kexec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/kernel/machine_kexec.c b/arch/mips/kernel/machine_kexec.c
index 432bfd3e7f22..4e3579bbd620 100644
--- a/arch/mips/kernel/machine_kexec.c
+++ b/arch/mips/kernel/machine_kexec.c
@@ -8,6 +8,7 @@
 #include <linux/mm.h>
 #include <linux/delay.h>
 #include <linux/libfdt.h>
+#include <linux/reboot.h>
 
 #include <asm/cacheflush.h>
 #include <asm/page.h>
-- 
2.39.2

Re: [PATCH 00/20] mips: address -Wmissing-prototypes warnings

[Thomas Bogendoerfer]

On Mon, Dec 04, 2023 at 12:56:50PM +0100, Arnd Bergmann wrote:
> The patches could either go through Thomas's mips tree, or
> alternatively through linux-mm along with the hexagon patches
> that Andrew has already merged.

I'd prefer to have in MIPS tree to also fix the other missing pieces.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]