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

Pull ARM fixes from Russell King:
 "Three fixes this time around:

   - fix a memory leak which occurs when probing performance monitoring
     unit interrupts

   - fix handling of non-PMD aligned end of RAM causing boot failures

   - fix missing syscall trace exit path with syscall tracing enabled
     causing a kernel oops in the audit code"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8357/1: perf: fix memory leak when probing PMU PPIs
  ARM: fix missing syscall trace exit
  ARM: 8356/1: mm: handle non-pmd-aligned end of RAM
This commit is contained in:
Linus Torvalds 2015-05-31 12:20:59 -07:00
parent e4ca714b63 8d2812849a
commit 36a8b9a774
3 changed files with 18 additions and 15 deletions
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4
arch/arm/kernel/entry-common.S
View File

@ -33,7 +33,9 @@ ret_fast_syscall:
UNWIND(.fnstart )
UNWIND(.cantunwind )
disable_irq @ disable interrupts
ldr r1, [tsk, #TI_FLAGS]
ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
tst r1, #_TIF_SYSCALL_WORK
bne __sys_trace_return
tst r1, #_TIF_WORK_MASK
bne fast_work_pending
asm_trace_hardirqs_on

9
arch/arm/kernel/perf_event_cpu.c
View File

@ -304,16 +304,17 @@ static int probe_current_pmu(struct arm_pmu *pmu)
static int of_pmu_irq_cfg(struct platform_device *pdev)
{
int i, irq;
int *irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
if (!irqs)
return -ENOMEM;
int *irqs;
/* Don't bother with PPIs; they're already affine */
irq = platform_get_irq(pdev, 0);
if (irq >= 0 && irq_is_percpu(irq))
return 0;
irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
if (!irqs)
return -ENOMEM;
for (i = 0; i < pdev->num_resources; ++i) {
struct device_node *dn;
int cpu;

20
arch/arm/mm/mmu.c
View File

@ -1112,22 +1112,22 @@ void __init sanity_check_meminfo(void)
}
/*
* Find the first non-section-aligned page, and point
* Find the first non-pmd-aligned page, and point
* memblock_limit at it. This relies on rounding the
* limit down to be section-aligned, which happens at
* the end of this function.
* limit down to be pmd-aligned, which happens at the
* end of this function.
*
* With this algorithm, the start or end of almost any
* bank can be non-section-aligned. The only exception
* is that the start of the bank 0 must be section-
* bank can be non-pmd-aligned. The only exception is
* that the start of the bank 0 must be section-
* aligned, since otherwise memory would need to be
* allocated when mapping the start of bank 0, which
* occurs before any free memory is mapped.
*/
if (!memblock_limit) {
if (!IS_ALIGNED(block_start, SECTION_SIZE))
if (!IS_ALIGNED(block_start, PMD_SIZE))
memblock_limit = block_start;
else if (!IS_ALIGNED(block_end, SECTION_SIZE))
else if (!IS_ALIGNED(block_end, PMD_SIZE))
memblock_limit = arm_lowmem_limit;
}
@ -1137,12 +1137,12 @@ void __init sanity_check_meminfo(void)
high_memory = __va(arm_lowmem_limit - 1) + 1;
/*
* Round the memblock limit down to a section size. This
* Round the memblock limit down to a pmd size. This
* helps to ensure that we will allocate memory from the
* last full section, which should be mapped.
* last full pmd, which should be mapped.
*/
if (memblock_limit)
memblock_limit = round_down(memblock_limit, SECTION_SIZE);
memblock_limit = round_down(memblock_limit, PMD_SIZE);
if (!memblock_limit)
memblock_limit = arm_lowmem_limit;