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b93ddc4f91
linux/arch/mips/kernel
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Serge Semin b93ddc4f91
mips: Reserve memory for the kernel image resources 
The reserved_end variable had been used by the bootmem_init() code
to find a lowest limit of memory available for memmap blob. The original
code just tried to find a free memory space higher than kernel was placed.
This limitation seems justified for the memmap ragion search process, but
I can't see any obvious reason to reserve the unused space below kernel
seeing some platforms place it much higher than standard 1MB. Moreover
the RELOCATION config enables it to be loaded at any memory address.
So lets reserve the memory occupied by the kernel only, leaving the region
below being free for allocations. After doing this we can now discard the
code freeing a space between kernel _text and VMLINUX_LOAD_ADDRESS symbols
since it's going to be free anyway (unless marked as reserved by
platforms).

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Matt Redfearn <matt.redfearn@mips.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
2019-05-02 11:22:08 -07:00
..
syscalls y2038: add 64-bit time_t syscalls to all 32-bit architectures 2019-02-07 00:13:28 +01:00
.gitignore
8250-platform.c
asm-offsets.c MIPS: Remove struct task_struct fpu state when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:19 -08:00
binfmt_elfn32.c y2038: globally rename compat_time to old_time32 2018-08-27 14:48:48 +02:00
binfmt_elfo32.c y2038: globally rename compat_time to old_time32 2018-08-27 14:48:48 +02:00
bmips_5xxx_init.S MIPS: BCM5xxx: Remove dead init_fpu code 2018-11-08 11:20:57 -08:00
bmips_vec.S MIPS: BMIPS: Add Whirlwind (BMIPS5200) initialization code 2016-05-09 12:00:01 +02:00
branch.c mips: annotate implicit fall throughs 2018-12-03 13:42:38 -08:00
cacheinfo.c MIPS: Fix cacheinfo overflow 2017-02-13 18:57:34 +00:00
cevt-bcm1480.c MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks 2017-04-14 13:11:16 -07:00
cevt-ds1287.c MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks 2017-04-14 13:11:16 -07:00
cevt-gt641xx.c MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks 2017-04-14 13:11:16 -07:00
cevt-r4k.c MIPS: cevt-r4k: Fix out-of-bounds array access 2017-04-10 13:31:12 +02:00
cevt-sb1250.c MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks 2017-04-14 13:11:16 -07:00
cevt-txx9.c MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks 2017-04-14 13:11:16 -07:00
cmpxchg.c MIPS: fix truncation in __cmpxchg_small for short values 2019-02-11 12:02:08 -08:00
cps-vec-ns16550.S Update MIPS email addresses 2017-11-03 09:02:30 -07:00
cps-vec.S MIPS: CPS: Fix MIPS_ISA_LEVEL_RAW fallout 2018-02-05 11:53:06 +00:00
cpu-bugs64.c MIPS: Remove GCC_IMM_ASM & GCC_REG_ACCUM macros 2018-11-07 16:25:30 -08:00
cpu-probe.c MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
crash_dump.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
crash.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
csrc-bcm1480.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
csrc-ioasic.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
csrc-r4k.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
csrc-sb1250.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
early_printk_8250.c mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
early_printk.c mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
elf.c MIPS: Avoid FP ELF checks when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:18 -08:00
entry.S MIPS: entry: Remove unneeded need_resched() loop 2019-03-19 15:25:45 -07:00
ftrace.c get rid of legacy 'get_ds()' function 2019-03-04 10:50:14 -08:00
genex.S MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
gpio_txx9.c MIPS: txx9: switch to gpiochip_add_data() 2016-02-19 09:51:44 +01:00
head.S MIPS/head: Store ELF appended dtb in a global variable too 2018-09-25 16:27:24 -07:00
i8253.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idle.c MIPS: Loongson: Add Loongson-3A R2.1 basic support 2018-11-19 15:20:31 -08:00
irq_txx9.c
irq-gt641xx.c
irq-msc01.c
irq-rm7000.c
irq.c MIPS: irq: Allocate accurate order pages for irq stack 2019-02-19 12:45:01 -08:00
jump_label.c MIPS: jump_label: Use compact branches for >= r6 2019-04-09 16:21:30 -07:00
kgdb.c get rid of legacy 'get_ds()' function 2019-03-04 10:50:14 -08:00
kprobes.c bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe 2018-06-21 12:33:19 +02:00
linux32.c MIPS: Delete unused code in linux32.c 2018-08-01 13:20:27 -07:00
machine_kexec.c MIPS: kdump: Mark cpu back online before rebooting 2018-09-28 10:09:03 -07:00
Makefile mips: rename scall64-64.S to scall64-n64.S 2018-12-14 11:19:01 -08:00
mcount.S mips: ftrace: fix static function graph tracing 2018-06-19 15:00:12 -07:00
mips_machine.c
mips-cm.c Here's the main MIPS pull request for v5.1: 2019-03-05 11:28:25 -08:00
mips-cpc.c MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base() 2018-02-08 14:02:01 +00:00
mips-mt-fpaff.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mips-mt.c MIPS: MT: Remove norps command line parameter 2018-11-26 22:49:14 -08:00
mips-r2-to-r6-emul.c mips: kernel: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
module.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-07-15 10:59:54 -07:00
octeon_switch.S Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables 2018-06-14 12:21:18 +09:00
perf_event_mipsxx.c MIPS: perf: Fix perf with MT counting other threads 2018-05-15 15:53:44 +01:00
perf_event.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
pm-cps.c MIPS: pm-cps: Block system suspend when a JTAG probe is present 2018-03-09 13:53:26 +00:00
pm.c MIPS: Fix watchpoint restoration 2016-05-09 12:00:02 +02:00
probes-common.h MIPS: Update email address for Marcin Nowakowski 2017-11-02 10:58:43 +00:00
proc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
process.c MIPS: Remove function size check in get_frame_info() 2019-02-04 15:15:34 -08:00
prom.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
ptrace32.c MIPS: ptrace: Remove FP support when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:17 -08:00
ptrace.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
r4k_fpu.S MIPS: Simplify FP context initialization 2018-11-09 10:23:13 -08:00
r4k_switch.S Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables 2018-06-14 12:21:18 +09:00
r2300_fpu.S MIPS: Simplify FP context initialization 2018-11-09 10:23:13 -08:00
r2300_switch.S Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables 2018-06-14 12:21:18 +09:00
relocate_kernel.S MIPS: kexec: fix typos 2018-06-24 09:26:01 -07:00
relocate.c MIPS: Remove no-op/identity casts 2018-08-31 11:49:20 -07:00
reset.c MIPS: Hang more efficiently on halt/powerdown/restart 2018-03-09 11:22:43 +00:00
rtlx-cmp.c
rtlx-mt.c
rtlx.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
scall32-o32.S mips: generate uapi header and system call table files 2018-12-14 11:19:02 -08:00
scall64-n32.S mips: generate uapi header and system call table files 2018-12-14 11:19:02 -08:00
scall64-n64.S mips: generate uapi header and system call table files 2018-12-14 11:19:02 -08:00
scall64-o32.S mips: generate uapi header and system call table files 2018-12-14 11:19:02 -08:00
segment.c mips: kernel: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
setup.c mips: Reserve memory for the kernel image resources 2019-05-02 11:22:08 -07:00
signal32.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
signal_n32.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
signal_o32.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
signal-common.h
signal.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
smp-bmips.c MIPS: kexec: Make a framework for both jumping and halting on nonboot CPUs 2018-09-22 10:31:50 -07:00
smp-cmp.c MIPS: smp-cmp: Fix vpe_id build error 2017-11-01 23:23:00 +00:00
smp-cps.c MIPS: kexec: CPS systems to halt nonboot CPUs 2018-09-22 10:32:33 -07:00
smp-mt.c MIPS: Use mips_gic_present() in place of gic_present 2017-09-04 13:53:14 +02:00
smp-up.c MIPS: SMP: Allow boot_secondary SMP op to return errors 2017-08-30 00:57:27 +02:00
smp.c MIPS: SGI-IP27: do boot CPU init later 2019-02-19 12:46:03 -08:00
spinlock_test.c mips: kernel: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
spram.c MIPS: Add P6600 cases to CPU switch statements 2016-05-13 14:01:52 +02:00
stacktrace.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
sync-r4k.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
sysrq.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
time.c MIPS: Convert update_persistent_clock() to update_persistent_clock64() 2018-05-14 23:58:23 +01:00
topology.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
traps.c MIPS: Remove duplicate EBase configuration 2019-05-02 11:21:08 -07:00
unaligned.c MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
uprobes.c Uprobe: Additional argument arch_uprobe to uprobe_write_opcode() 2018-08-13 20:08:33 -04:00
vdso.c MIPS: math-emu: Write-protect delay slot emulation pages 2018-12-20 10:00:01 -08:00
vmlinux.lds.S MIPS: Ensure ELF appended dtb is relocated 2019-03-11 11:08:31 -07:00
vpe-cmp.c
vpe-mt.c
vpe.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
watch.c mips: annotate implicit fall throughs 2018-12-03 13:42:38 -08:00