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Commit 5f01feb8 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 

Pull ARM fixes from Russell King:
 "Two fixes this time, one to ensure that the kuser helper option
  depends on MMU as they aren't available for noMMU targets (and if the
  option is selected, we end up oopsing.)

  The second fix plugs a corner case with the decompressor, ensuring
  that the instruction stream can see the relocated code in every case
  on ARMv7 CPUs"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8198/1: make kuser helpers depend on MMU
  ARM: 8191/1: decompressor: ensure I-side picks up relocated code
parents 555e5986 08b964ff

arch/arm/boot/compressed/head.S

+16 −4
Original line number Diff line number Diff line
@@ -397,8 +397,7 @@ dtb_check_done: 
		add	sp, sp, r6

#endif



		tst	r4, #1

		bleq	cache_clean_flush

		bl	cache_clean_flush



		adr	r0, BSYM(restart)

		add	r0, r0, r6
@@ -1047,6 +1046,8 @@ cache_clean_flush: 
		b	call_cache_fn



__armv4_mpu_cache_flush:

		tst	r4, #1

		movne	pc, lr

		mov	r2, #1

		mov	r3, #0

		mcr	p15, 0, ip, c7, c6, 0	@ invalidate D cache
@@ -1064,6 +1065,8 @@ __armv4_mpu_cache_flush: 
		mov	pc, lr

		

__fa526_cache_flush:

		tst	r4, #1

		movne	pc, lr

		mov	r1, #0

		mcr	p15, 0, r1, c7, c14, 0	@ clean and invalidate D cache

		mcr	p15, 0, r1, c7, c5, 0	@ flush I cache
@@ -1072,13 +1075,16 @@ __fa526_cache_flush: 


__armv6_mmu_cache_flush:

		mov	r1, #0

		mcr	p15, 0, r1, c7, c14, 0	@ clean+invalidate D

		tst	r4, #1

		mcreq	p15, 0, r1, c7, c14, 0	@ clean+invalidate D

		mcr	p15, 0, r1, c7, c5, 0	@ invalidate I+BTB

		mcr	p15, 0, r1, c7, c15, 0	@ clean+invalidate unified

		mcreq	p15, 0, r1, c7, c15, 0	@ clean+invalidate unified

		mcr	p15, 0, r1, c7, c10, 4	@ drain WB

		mov	pc, lr



__armv7_mmu_cache_flush:

		tst	r4, #1

		bne	iflush

		mrc	p15, 0, r10, c0, c1, 5	@ read ID_MMFR1

		tst	r10, #0xf << 16		@ hierarchical cache (ARMv7)

		mov	r10, #0
@@ -1139,6 +1145,8 @@ iflush: 
		mov	pc, lr



__armv5tej_mmu_cache_flush:

		tst	r4, #1

		movne	pc, lr

1:		mrc	p15, 0, r15, c7, c14, 3	@ test,clean,invalidate D cache

		bne	1b

		mcr	p15, 0, r0, c7, c5, 0	@ flush I cache
@@ -1146,6 +1154,8 @@ __armv5tej_mmu_cache_flush: 
		mov	pc, lr



__armv4_mmu_cache_flush:

		tst	r4, #1

		movne	pc, lr

		mov	r2, #64*1024		@ default: 32K dcache size (*2)

		mov	r11, #32		@ default: 32 byte line size

		mrc	p15, 0, r3, c0, c0, 1	@ read cache type
@@ -1179,6 +1189,8 @@ no_cache_id: 


__armv3_mmu_cache_flush:

__armv3_mpu_cache_flush:

		tst	r4, #1

		movne	pc, lr

		mov	r1, #0

		mcr	p15, 0, r1, c7, c0, 0	@ invalidate whole cache v3

		mov	pc, lr

arch/arm/mm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -798,6 +798,7 @@ config NEED_KUSER_HELPERS 


config KUSER_HELPERS

	bool "Enable kuser helpers in vector page" if !NEED_KUSER_HELPERS

	depends on MMU

	default y

	help

	  Warning: disabling this option may break user programs.