/* * Example of using hugepage memory in a user application using the mmap * system call with MAP_HUGETLB flag. Before running this program make * sure the administrator has allocated enough default sized huge pages * to cover the 256 MB allocation. * * For ia64 architecture, Linux kernel reserves Region number 4 for hugepages. * That means the addresses starting with 0x800000... will need to be * specified. Specifying a fixed address is not required on ppc64, i386 * or x86_64. */ #include #include #include #include #include #define LENGTH (256UL*1024*1024) #define PROTECTION (PROT_READ | PROT_WRITE) #ifndef MAP_HUGETLB #define MAP_HUGETLB 0x40000 /* arch specific */ #endif /* Only ia64 requires this */ #ifdef __ia64__ #define ADDR (void *)(0x8000000000000000UL) #define FLAGS (MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_FIXED) #else #define ADDR (void *)(0x0UL) #define FLAGS (MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB) #endif static void check_bytes(char *addr) { printf("First hex is %x\n", *((unsigned int *)addr)); } static void write_bytes(char *addr) { unsigned long i; for (i = 0; i < LENGTH; i++) *(addr + i) = (char)i; } static int read_bytes(char *addr) { unsigned long i; check_bytes(addr); for (i = 0; i < LENGTH; i++) if (*(addr + i) != (char)i) { printf("Mismatch at %lu\n", i); return 1; } return 0; } int main(void) { void *addr; int ret; addr = mmap(ADDR, LENGTH, PROTECTION, FLAGS, 0, 0); if (addr == MAP_FAILED) { perror("mmap"); exit(1); } printf("Returned address is %p\n", addr); check_bytes(addr); write_bytes(addr); ret = read_bytes(addr); /* munmap() length of MAP_HUGETLB memory must be hugepage aligned */ if (munmap(addr, LENGTH)) { perror("munmap"); exit(1); } return ret; } =nds-private-remove'>logtreecommitdiff
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authorZach Ploskey <zach@ploskey.com>2017-01-22 00:47:19 -0800
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-01-22 12:47:06 +0200
commitcfee5d63767b2e7997c1f36420d008abbe61565c (patch)
treec66a512525d224f9675c33a8d156e0f058db1de6 /include/net/bluetooth/rfcomm.h
parent5a00b6c2438460b870a451f14593fc40d3c7edf6 (diff)
platform/x86: ideapad-laptop: handle ACPI event 1
On Ideapad laptops, ACPI event 1 is currently not handled. Many models log "ideapad_laptop: Unknown event: 1" every 20 seconds or so while running on battery power. Some convertible laptops receive this event when switching in and out of tablet mode. This adds and additional case for event 1 in ideapad_acpi_notify to call ideapad_input_report(priv, vpc_bit), so that the event is reported to userspace and we avoid unnecessary logging. Fixes bug #107481 (https://bugzilla.kernel.org/show_bug.cgi?id=107481) Fixes bug #65751 (https://bugzilla.kernel.org/show_bug.cgi?id=65751) Signed-off-by: Zach Ploskey <zach@ploskey.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'include/net/bluetooth/rfcomm.h')