Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 127 deletions

diff --git a/arch/m32r/include/asm/processor.h b/arch/m32r/include/asm/processor.h
deleted file mode 100644
index c70fa9ac7169..000000000000
--- a/arch/m32r/include/asm/processor.h
+++ /dev/null
@@ -1,127 +0,0 @@
-#ifndef _ASM_M32R_PROCESSOR_H
-#define _ASM_M32R_PROCESSOR_H
-
-/*
- * include/asm-m32r/processor.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1994  Linus Torvalds
- * Copyright (C) 2001  Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
- * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#include <linux/kernel.h>
-#include <asm/cache.h>
-#include <asm/ptrace.h>  /* pt_regs */
-
-/*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
-#define current_text_addr() ({ __label__ _l; _l: &&_l; })
-
-/*
- *  CPU type and hardware bug flags. Kept separately for each CPU.
- *  Members of this structure are referenced in head.S, so think twice
- *  before touching them. [mj]
- */
-
-struct cpuinfo_m32r {
-	unsigned long pgtable_cache_sz;
-	unsigned long cpu_clock;
-	unsigned long bus_clock;
-	unsigned long timer_divide;
-	unsigned long loops_per_jiffy;
-};
-
-/*
- * capabilities of CPUs
- */
-
-extern struct cpuinfo_m32r boot_cpu_data;
-
-#ifdef CONFIG_SMP
-extern struct cpuinfo_m32r cpu_data[];
-#define current_cpu_data cpu_data[smp_processor_id()]
-#else
-#define cpu_data (&boot_cpu_data)
-#define current_cpu_data boot_cpu_data
-#endif
-
-/*
- * User space process size: 2GB (default).
- */
-#ifdef CONFIG_MMU
-#define TASK_SIZE  (0x80000000UL)
-#else
-#define TASK_SIZE  (0x00400000UL)
-#endif
-
-#ifdef __KERNEL__
-#define STACK_TOP	TASK_SIZE
-#define STACK_TOP_MAX	STACK_TOP
-#endif
-
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define TASK_UNMAPPED_BASE	PAGE_ALIGN(TASK_SIZE / 3)
-
-typedef struct {
-	unsigned long seg;
-} mm_segment_t;
-
-#define MAX_TRAPS 10
-
-struct debug_trap {
-	int nr_trap;
-	unsigned long	addr[MAX_TRAPS];
-	unsigned long	insn[MAX_TRAPS];
-};
-
-struct thread_struct {
-	unsigned long address;
-	unsigned long trap_no;		/* Trap number  */
-	unsigned long error_code;	/* Error code of trap */
-	unsigned long lr;		/* saved pc */
-	unsigned long sp;		/* user stack pointer */
-	struct debug_trap debug_trap;
-};
-
-#define INIT_SP	(sizeof(init_stack) + (unsigned long) &init_stack)
-
-#define INIT_THREAD	{	\
-	.sp = INIT_SP,		\
-}
-
-/*
- * Do necessary setup to start up a newly executed thread.
- */
-
-/* User process Backup PSW */
-#define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
-
-#define start_thread(regs, new_pc, new_spu) 				\
-	do {								\
-		regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL;	\
-		regs->bpc = new_pc;					\
-		regs->spu = new_spu;					\
-	} while (0)
-
-/* Forward declaration, a strange C thing */
-struct task_struct;
-struct mm_struct;
-
-/* Free all resources held by a thread. */
-extern void release_thread(struct task_struct *);
-
-unsigned long get_wchan(struct task_struct *p);
-#define KSTK_EIP(tsk)  ((tsk)->thread.lr)
-#define KSTK_ESP(tsk)  ((tsk)->thread.sp)
-
-#define cpu_relax()	barrier()
-
-#endif /* _ASM_M32R_PROCESSOR_H */