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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] More verbose show_mem() like other architectures. [S390] Make use of kretprobe_assert. [S390] Wire up signald, timerfd and eventfd syscalls. [S390] Wire up sys_utimensat. [S390] cio: Update documentation.
This commit is contained in:
Linus Torvalds
commit
4b85df0419
@ -51,13 +51,8 @@ The major changes are:
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* The interrupt handlers must be adapted to use a ccw_device as argument.
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Moreover, they don't return a devstat, but an irb.
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* Before initiating an io, the options must be set via ccw_device_set_options().
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read_dev_chars()
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read device characteristics
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read_conf_data()
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read_conf_data_lpm()
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read configuration data.
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* Instead of calling read_dev_chars()/read_conf_data(), the driver issues
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the channel program and handles the interrupt itself.
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ccw_device_get_ciw()
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get commands from extended sense data.
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@ -130,11 +125,6 @@ present their hardware status by the same (shared) IRQ, the operating system
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has to call every single device driver registered on this IRQ in order to
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determine the device driver owning the device that raised the interrupt.
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In order not to introduce a new I/O concept to the common Linux code,
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Linux/390 preserves the IRQ concept and semantically maps the ESA/390
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subchannels to Linux as IRQs. This allows Linux/390 to support up to 64k
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different IRQs, uniquely representing a single device each.
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Up to kernel 2.4, Linux/390 used to provide interfaces via the IRQ (subchannel).
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For internal use of the common I/O layer, these are still there. However,
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device drivers should use the new calling interface via the ccw_device only.
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@ -151,9 +141,8 @@ information during their initialization step to recognize the devices they
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support using the information saved in the struct ccw_device given to them.
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This methods implies that Linux/390 doesn't require to probe for free (not
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armed) interrupt request lines (IRQs) to drive its devices with. Where
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applicable, the device drivers can use the read_dev_chars() to retrieve device
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characteristics. This can be done without having to request device ownership
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previously.
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applicable, the device drivers can use issue the READ DEVICE CHARACTERISTICS
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ccw to retrieve device characteristics in its online routine.
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In order to allow for easy I/O initiation the CDS layer provides a
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ccw_device_start() interface that takes a device specific channel program (one
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@ -170,69 +159,6 @@ SUBCHANNEL (HSCH) command without having pending I/O requests. This function is
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also covered by ccw_device_halt().
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read_dev_chars() - Read Device Characteristics
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This routine returns the characteristics for the device specified.
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The function is meant to be called with the device already enabled; that is,
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at earliest during set_online() processing.
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The ccw_device must not be locked prior to calling read_dev_chars().
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The function may be called enabled or disabled.
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int read_dev_chars(struct ccw_device *cdev, void **buffer, int length );
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cdev - the ccw_device the information is requested for.
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buffer - pointer to a buffer pointer. The buffer pointer itself
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must contain a valid buffer area.
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length - length of the buffer provided.
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The read_dev_chars() function returns :
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0 - successful completion
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-ENODEV - cdev invalid
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-EINVAL - an invalid parameter was detected, or the function was called early.
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-EBUSY - an irrecoverable I/O error occurred or the device is not
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operational.
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read_conf_data(), read_conf_data_lpm() - Read Configuration Data
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Retrieve the device dependent configuration data. Please have a look at your
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device dependent I/O commands for the device specific layout of the node
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descriptor elements. read_conf_data_lpm() will retrieve the configuration data
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for a specific path.
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The function is meant to be called with the device already enabled; that is,
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at earliest during set_online() processing.
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The function may be called enabled or disabled, but the device must not be
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locked
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int read_conf_data(struct ccw_device, void **buffer, int *length);
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int read_conf_data_lpm(struct ccw_device, void **buffer, int *length, __u8 lpm);
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cdev - the ccw_device the data is requested for.
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buffer - Pointer to a buffer pointer. The read_conf_data() routine
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will allocate a buffer and initialize the buffer pointer
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accordingly. It's the device driver's responsibility to
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release the kernel memory if no longer needed.
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length - Length of the buffer allocated and retrieved.
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lpm - Logical path mask to be used for retrieving the data. If
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zero the data is retrieved on the next path available.
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The read_conf_data() function returns :
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0 - Successful completion
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-ENODEV - cdev invalid.
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-EINVAL - An invalid parameter was detected, or the function was called early.
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-EIO - An irrecoverable I/O error occurred or the device is
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not operational.
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-ENOMEM - The read_conf_data() routine couldn't obtain storage.
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-EOPNOTSUPP - The device doesn't support the read configuration
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data command.
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get_ciw() - get command information word
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This call enables a device driver to get information about supported commands
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@ -1682,3 +1682,31 @@ compat_sys_utimes_wrapper:
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llgtr %r2,%r2 # char *
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llgtr %r3,%r3 # struct compat_timeval *
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jg compat_sys_utimes
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.globl compat_sys_utimensat_wrapper
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compat_sys_utimensat_wrapper:
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llgfr %r2,%r2 # unsigned int
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llgtr %r3,%r3 # char *
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llgtr %r4,%r4 # struct compat_timespec *
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lgfr %r5,%r5 # int
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jg compat_sys_utimensat
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.globl compat_sys_signalfd_wrapper
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compat_sys_signalfd_wrapper:
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lgfr %r2,%r2 # int
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llgtr %r3,%r3 # compat_sigset_t *
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llgfr %r4,%r4 # compat_size_t
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jg compat_sys_signalfd
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.globl compat_sys_timerfd_wrapper
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compat_sys_timerfd_wrapper:
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lgfr %r2,%r2 # int
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lgfr %r3,%r3 # int
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lgfr %r4,%r4 # int
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llgtr %r5,%r5 # struct compat_itimerspec *
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jg compat_sys_timerfd
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.globl sys_eventfd_wrapper
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sys_eventfd_wrapper:
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llgfr %r2,%r2 # unsigned int
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jg sys_eventfd
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@ -413,7 +413,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
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break;
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}
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}
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BUG_ON(!orig_ret_address || (orig_ret_address == trampoline_address));
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kretprobe_assert(ri, orig_ret_address, trampoline_address);
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regs->psw.addr = orig_ret_address | PSW_ADDR_AMODE;
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reset_current_kprobe();
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@ -322,3 +322,8 @@ NI_SYSCALL /* 310 sys_move_pages */
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SYSCALL(sys_getcpu,sys_getcpu,sys_getcpu_wrapper)
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SYSCALL(sys_epoll_pwait,sys_epoll_pwait,compat_sys_epoll_pwait_wrapper)
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SYSCALL(sys_utimes,sys_utimes,compat_sys_utimes_wrapper)
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NI_SYSCALL /* 314 sys_fallocate */
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SYSCALL(sys_utimensat,sys_utimensat,compat_sys_utimensat_wrapper) /* 315 */
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SYSCALL(sys_signalfd,sys_signalfd,compat_sys_signalfd_wrapper)
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SYSCALL(sys_timerfd,sys_timerfd,compat_sys_timerfd_wrapper)
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SYSCALL(sys_eventfd,sys_eventfd,sys_eventfd_wrapper)
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@ -67,7 +67,7 @@ void show_mem(void)
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printk("Mem-info:\n");
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show_free_areas();
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printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
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printk("Free swap: %6ldkB\n", nr_swap_pages << (PAGE_SHIFT - 10));
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i = max_mapnr;
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while (i-- > 0) {
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if (!pfn_valid(i))
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@ -81,10 +81,18 @@ void show_mem(void)
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else if (page_count(page))
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shared += page_count(page) - 1;
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}
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printk("%d pages of RAM\n",total);
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printk("%d reserved pages\n",reserved);
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printk("%d pages shared\n",shared);
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printk("%d pages swap cached\n",cached);
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printk("%d pages of RAM\n", total);
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printk("%d reserved pages\n", reserved);
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printk("%d pages shared\n", shared);
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printk("%d pages swap cached\n", cached);
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printk("%lu pages dirty\n", global_page_state(NR_FILE_DIRTY));
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printk("%lu pages writeback\n", global_page_state(NR_WRITEBACK));
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printk("%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
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printk("%lu pages slab\n",
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global_page_state(NR_SLAB_RECLAIMABLE) +
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global_page_state(NR_SLAB_UNRECLAIMABLE));
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printk("%lu pages pagetables\n", global_page_state(NR_PAGETABLE));
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}
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static void __init setup_ro_region(void)
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@ -251,8 +251,12 @@
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#define __NR_getcpu 311
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#define __NR_epoll_pwait 312
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#define __NR_utimes 313
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#define NR_syscalls 314
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/* Number 314 is reserved for new sys_fallocate */
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#define __NR_utimensat 315
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#define __NR_signalfd 316
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#define __NR_timerfd 317
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#define __NR_eventfd 318
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#define NR_syscalls 319
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/*
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* There are some system calls that are not present on 64 bit, some
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@ -346,6 +350,19 @@
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#ifdef __KERNEL__
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#ifndef CONFIG_64BIT
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#define __IGNORE_select
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#else
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#define __IGNORE_time
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#endif
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/* Ignore NUMA system calls. Not wired up on s390. */
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#define __IGNORE_mbind
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#define __IGNORE_get_mempolicy
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#define __IGNORE_set_mempolicy
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#define __IGNORE_migrate_pages
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#define __IGNORE_move_pages
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#define __ARCH_WANT_IPC_PARSE_VERSION
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#define __ARCH_WANT_OLD_READDIR
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#define __ARCH_WANT_SYS_ALARM
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