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| author | Alex Shi <alex.shi@linaro.org> | 2018-01-18 15:26:28 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2018-01-18 15:26:28 +0800 |
| commit | 2ba51c6d36ee1b43c1f898c6c48ddf3d33e9ab30 (patch) | |
| tree | ff3302dc45a91d7bfcaabd37bfa8fa391a954180 /arch/arm/kernel/entry-header.S | |
| parent | 28610abf4a574c33ca70e3d7b0e523fdede488d1 (diff) | |
| parent | 90816cc1d4a1d23efe37b74866c6174dd5eab6b5 (diff) | |
Merge remote-tracking branch 'rt-stable/v4.9-rt' into linux-linaro-lsk-v4.9-rtlsk-v4.9-18.02-rt
Conflicts:
arch/arm64/mm/init.c
Diffstat (limited to 'arch/arm/kernel/entry-header.S')
| -rw-r--r-- | arch/arm/kernel/entry-header.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index 6391728c8f03..e056c9a9aa9d 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -299,6 +299,8 @@ mov r2, sp ldr r1, [r2, #\offset + S_PSR] @ get calling cpsr ldr lr, [r2, #\offset + S_PC]! @ get pc + tst r1, #PSR_I_BIT | 0x0f + bne 1f msr spsr_cxsf, r1 @ save in spsr_svc #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_32v6K) @ We must avoid clrex due to Cortex-A15 erratum #830321 @@ -313,6 +315,7 @@ @ after ldm {}^ add sp, sp, #\offset + PT_REGS_SIZE movs pc, lr @ return & move spsr_svc into cpsr +1: bug "Returning to usermode but unexpected PSR bits set?", \@ #elif defined(CONFIG_CPU_V7M) @ V7M restore. @ Note that we don't need to do clrex here as clearing the local @@ -328,6 +331,8 @@ ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr ldr lr, [sp, #\offset + S_PC] @ get pc add sp, sp, #\offset + S_SP + tst r1, #PSR_I_BIT | 0x0f + bne 1f msr spsr_cxsf, r1 @ save in spsr_svc @ We must avoid clrex due to Cortex-A15 erratum #830321 @@ -340,6 +345,7 @@ .endif add sp, sp, #PT_REGS_SIZE - S_SP movs pc, lr @ return & move spsr_svc into cpsr +1: bug "Returning to usermode but unexpected PSR bits set?", \@ #endif /* !CONFIG_THUMB2_KERNEL */ .endm |