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authorLinus Torvalds <torvalds@linux-foundation.org>2019-10-23 06:26:33 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2019-10-23 06:26:33 -0400
commit13b86bc4cd648eae69fdcf3d04b2750c76350053 (patch)
treed495a635f013aacf2053364a066d83a176328784 /arch/arm/kernel
parente969c860d56345b2c2efd2bf2b6d8c716bdc1468 (diff)
parent39f4d441048444f38fcfcfb1aa3102c030544e86 (diff)
downloadblackbird-op-linux-13b86bc4cd648eae69fdcf3d04b2750c76350053.tar.gz
blackbird-op-linux-13b86bc4cd648eae69fdcf3d04b2750c76350053.zip
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
:Pull ARM fixes from Russell King: - fix for alignment faults under high memory pressure - use u32 for ARM instructions in fault handler - mark functions that must always be inlined with __always_inline - fix for nommu XIP - fix ARMv7M switch to handler mode in reboot path - fix the recently introduced AMBA reset control error paths * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8926/1: v7m: remove register save to stack before svc ARM: 8914/1: NOMMU: Fix exc_ret for XIP ARM: 8908/1: add __always_inline to functions called from __get_user_check() ARM: mm: alignment: use "u32" for 32-bit instructions ARM: mm: fix alignment handler faults under memory pressure drivers/amba: fix reset control error handling
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/head-common.S5
-rw-r--r--arch/arm/kernel/head-nommu.S2
2 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index a7810be07da1..4a3982812a40 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -68,7 +68,7 @@ ENDPROC(__vet_atags)
* The following fragment of code is executed with the MMU on in MMU mode,
* and uses absolute addresses; this is not position independent.
*
- * r0 = cp#15 control register
+ * r0 = cp#15 control register (exc_ret for M-class)
* r1 = machine ID
* r2 = atags/dtb pointer
* r9 = processor ID
@@ -137,7 +137,8 @@ __mmap_switched_data:
#ifdef CONFIG_CPU_CP15
.long cr_alignment @ r3
#else
- .long 0 @ r3
+M_CLASS(.long exc_ret) @ r3
+AR_CLASS(.long 0) @ r3
#endif
.size __mmap_switched_data, . - __mmap_switched_data
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index afa350f44dea..0fc814bbc34b 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -201,6 +201,8 @@ M_CLASS(streq r3, [r12, #PMSAv8_MAIR1])
bic r0, r0, #V7M_SCB_CCR_IC
#endif
str r0, [r12, V7M_SCB_CCR]
+ /* Pass exc_ret to __mmap_switched */
+ mov r0, r10
#endif /* CONFIG_CPU_CP15 elif CONFIG_CPU_V7M */
ret lr
ENDPROC(__after_proc_init)
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