/* * Originally done by Vince Weaver for * perf_event_tests (git://github.com/deater/perf_event_tests) */ /* * Powerpc needs __SANE_USERSPACE_TYPES__ before to select * 'int-ll64.h' and avoid compile warnings when printing __u64 with %llu. */ #define __SANE_USERSPACE_TYPES__ #include #include #include #include #include #include #include #include #include #include #include #include "tests.h" #include "debug.h" #include "perf.h" #include "cloexec.h" static int overflows; __attribute__ ((noinline)) static int test_function(void) { return time(NULL); } static void sig_handler(int signum __maybe_unused, siginfo_t *oh __maybe_unused, void *uc __maybe_unused) { overflows++; } static long long bp_count(int fd) { long long count; int ret; ret = read(fd, &count, sizeof(long long)); if (ret != sizeof(long long)) { pr_debug("failed to read: %d\n", ret); return TEST_FAIL; } return count; } #define EXECUTIONS 10000 #define THRESHOLD 100 int test__bp_signal_overflow(int subtest __maybe_unused) { struct perf_event_attr pe; struct sigaction sa; long long count; int fd, i, fails = 0; /* setup SIGIO signal handler */ memset(&sa, 0, sizeof(struct sigaction)); sa.sa_sigaction = (void *) sig_handler; sa.sa_flags = SA_SIGINFO; if (sigaction(SIGIO, &sa, NULL) < 0) { pr_debug("failed setting up signal handler\n"); return TEST_FAIL; } memset(&pe, 0, sizeof(struct perf_event_attr)); pe.type = PERF_TYPE_BREAKPOINT; pe.size = sizeof(struct perf_event_attr); pe.config = 0; pe.bp_type = HW_BREAKPOINT_X; pe.bp_addr = (unsigned long) test_function; pe.bp_len = sizeof(long); pe.sample_period = THRESHOLD; pe.sample_type = PERF_SAMPLE_IP; pe.wakeup_events = 1; pe.disabled = 1; pe.exclude_kernel = 1; pe.exclude_hv = 1; fd = sys_perf_event_open(&pe, 0, -1, -1, perf_event_open_cloexec_flag()); if (fd < 0) { pr_debug("failed opening event %llx\n", pe.config); return TEST_FAIL; } fcntl(fd, F_SETFL, O_RDWR|O_NONBLOCK|O_ASYNC); fcntl(fd, F_SETSIG, SIGIO); fcntl(fd, F_SETOWN, getpid()); ioctl(fd, PERF_EVENT_IOC_RESET, 0); ioctl(fd, PERF_EVENT_IOC_ENABLE, 0); for (i = 0; i < EXECUTIONS; i++) test_function(); ioctl(fd, PERF_EVENT_IOC_DISABLE, 0); count = bp_count(fd); close(fd); pr_debug("count %lld, overflow %d\n", count, overflows); if (count != EXECUTIONS) { pr_debug("\tWrong number of executions %lld != %d\n", count, EXECUTIONS); fails++; } if (overflows != EXECUTIONS / THRESHOLD) { pr_debug("\tWrong number of overflows %d != %d\n", overflows, EXECUTIONS / THRESHOLD); fails++; } return fails ? TEST_FAIL : TEST_OK; } e
path: root/drivers/usb/phy/phy-am335x-control.c
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authorDan Williams <dan.j.williams@intel.com>2017-02-04 14:47:31 -0800
committerDan Williams <dan.j.williams@intel.com>2017-02-04 14:47:31 -0800
commitbfb34527a32a1a576d9bfb7026d3ab0369a6cd60 (patch)
treedb4d58c52d766eeb0c87cd6dba005839de933ede /drivers/usb/phy/phy-am335x-control.c
parente471486c13b82b1338d49c798f78bb62b1ed0a9e (diff)
libnvdimm, pfn: fix memmap reservation size versus 4K alignment
When vmemmap_populate() allocates space for the memmap it does so in 2MB sized chunks. The libnvdimm-pfn driver incorrectly accounts for this when the alignment of the device is set to 4K. When this happens we trigger memory allocation failures in altmap_alloc_block_buf() and trigger warnings of the form: WARNING: CPU: 0 PID: 3376 at arch/x86/mm/init_64.c:656 arch_add_memory+0xe4/0xf0 [..] Call Trace: dump_stack+0x86/0xc3 __warn+0xcb/0xf0 warn_slowpath_null+0x1d/0x20 arch_add_memory+0xe4/0xf0 devm_memremap_pages+0x29b/0x4e0 Fixes: 315c562536c4 ("libnvdimm, pfn: add 'align' attribute, default to HPAGE_SIZE") Cc: <stable@vger.kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/usb/phy/phy-am335x-control.c')