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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-08-30 11:58:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-08-30 11:58:02 -0700 |
| commit | 0a51b08fb3b4528e0915c4a4dd2ab0effa232359 (patch) | |
| tree | ff6adba8dff70351361e285286e09b0ea57e6642 /arch | |
| parent | 846d2db3e00048da3f650e0cfb0b8d67669cec3e (diff) | |
| parent | 5b3efa4f1479c91cb8361acef55f9c6662feba57 (diff) | |
| download | lwn-0a51b08fb3b4528e0915c4a4dd2ab0effa232359.tar.gz lwn-0a51b08fb3b4528e0915c4a4dd2ab0effa232359.zip | |
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"Three fixes for ARM this time around:
- A fix for update_sections_early() to cope with NULL ->mm pointers.
- A correction to the backtrace code to allow proper backtraces.
- Reinforcement of pfn_valid() with PFNs >= 4GiB"
* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8901/1: add a criteria for pfn_valid of arm
ARM: 8897/1: check stmfd instruction using right shift
ARM: 8874/1: mm: only adjust sections of valid mm structures
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/lib/backtrace.S | 2 | ||||
| -rw-r--r-- | arch/arm/mm/init.c | 8 |
2 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S index 1d5210eb4776..582925238d65 100644 --- a/arch/arm/lib/backtrace.S +++ b/arch/arm/lib/backtrace.S @@ -66,7 +66,7 @@ for_each_frame: tst frame, mask @ Check for address exceptions 1003: ldr r2, [sv_pc, #-4] @ if stmfd sp!, {args} exists, ldr r3, .Ldsi+4 @ adjust saved 'pc' back one - teq r3, r2, lsr #10 @ instruction + teq r3, r2, lsr #11 @ instruction subne r0, sv_pc, #4 @ allow for mov subeq r0, sv_pc, #8 @ allow for mov + stmia diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 16d373d587c4..b4be3baa83d4 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -175,6 +175,11 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max_low, #ifdef CONFIG_HAVE_ARCH_PFN_VALID int pfn_valid(unsigned long pfn) { + phys_addr_t addr = __pfn_to_phys(pfn); + + if (__phys_to_pfn(addr) != pfn) + return 0; + return memblock_is_map_memory(__pfn_to_phys(pfn)); } EXPORT_SYMBOL(pfn_valid); @@ -628,7 +633,8 @@ static void update_sections_early(struct section_perm perms[], int n) if (t->flags & PF_KTHREAD) continue; for_each_thread(t, s) - set_section_perms(perms, n, true, s->mm); + if (s->mm) + set_section_perms(perms, n, true, s->mm); } set_section_perms(perms, n, true, current->active_mm); set_section_perms(perms, n, true, &init_mm); |