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fb1c8f93d8
This patch (written by me and also containing many suggestions of Arjan van de Ven) does a major cleanup of the spinlock code. It does the following things: - consolidates and enhances the spinlock/rwlock debugging code - simplifies the asm/spinlock.h files - encapsulates the raw spinlock type and moves generic spinlock features (such as ->break_lock) into the generic code. - cleans up the spinlock code hierarchy to get rid of the spaghetti. Most notably there's now only a single variant of the debugging code, located in lib/spinlock_debug.c. (previously we had one SMP debugging variant per architecture, plus a separate generic one for UP builds) Also, i've enhanced the rwlock debugging facility, it will now track write-owners. There is new spinlock-owner/CPU-tracking on SMP builds too. All locks have lockup detection now, which will work for both soft and hard spin/rwlock lockups. The arch-level include files now only contain the minimally necessary subset of the spinlock code - all the rest that can be generalized now lives in the generic headers: include/asm-i386/spinlock_types.h | 16 include/asm-x86_64/spinlock_types.h | 16 I have also split up the various spinlock variants into separate files, making it easier to see which does what. The new layout is: SMP | UP ----------------------------|----------------------------------- asm/spinlock_types_smp.h | linux/spinlock_types_up.h linux/spinlock_types.h | linux/spinlock_types.h asm/spinlock_smp.h | linux/spinlock_up.h linux/spinlock_api_smp.h | linux/spinlock_api_up.h linux/spinlock.h | linux/spinlock.h /* * here's the role of the various spinlock/rwlock related include files: * * on SMP builds: * * asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the * initializers * * linux/spinlock_types.h: * defines the generic type and initializers * * asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel * implementations, mostly inline assembly code * * (also included on UP-debug builds:) * * linux/spinlock_api_smp.h: * contains the prototypes for the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. * * on UP builds: * * linux/spinlock_type_up.h: * contains the generic, simplified UP spinlock type. * (which is an empty structure on non-debug builds) * * linux/spinlock_types.h: * defines the generic type and initializers * * linux/spinlock_up.h: * contains the __raw_spin_*()/etc. version of UP * builds. (which are NOPs on non-debug, non-preempt * builds) * * (included on UP-non-debug builds:) * * linux/spinlock_api_up.h: * builds the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. */ All SMP and UP architectures are converted by this patch. arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via crosscompilers. m32r, mips, sh, sparc, have not been tested yet, but should be mostly fine. From: Grant Grundler <grundler@parisc-linux.org> Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU). Builds 32-bit SMP kernel (not booted or tested). I did not try to build non-SMP kernels. That should be trivial to fix up later if necessary. I converted bit ops atomic_hash lock to raw_spinlock_t. Doing so avoids some ugly nesting of linux/*.h and asm/*.h files. Those particular locks are well tested and contained entirely inside arch specific code. I do NOT expect any new issues to arise with them. If someone does ever need to use debug/metrics with them, then they will need to unravel this hairball between spinlocks, atomic ops, and bit ops that exist only because parisc has exactly one atomic instruction: LDCW (load and clear word). From: "Luck, Tony" <tony.luck@intel.com> ia64 fix Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjanv@infradead.org> Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se> Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
227 lines
5.6 KiB
C
227 lines
5.6 KiB
C
/*
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* linux/arch/alpha/kernel/ksyms.c
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*
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* Export the alpha-specific functions that are needed for loadable
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* modules.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/user.h>
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#include <linux/elfcore.h>
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#include <linux/socket.h>
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#include <linux/syscalls.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/pci.h>
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#include <linux/tty.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <asm/io.h>
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#include <asm/console.h>
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#include <asm/hwrpb.h>
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#include <asm/uaccess.h>
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#include <asm/processor.h>
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#include <asm/checksum.h>
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#include <linux/interrupt.h>
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#include <asm/fpu.h>
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#include <asm/irq.h>
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#include <asm/machvec.h>
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#include <asm/pgalloc.h>
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#include <asm/semaphore.h>
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#include <asm/tlbflush.h>
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#include <asm/cacheflush.h>
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#include <asm/vga.h>
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#define __KERNEL_SYSCALLS__
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#include <asm/unistd.h>
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extern struct hwrpb_struct *hwrpb;
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extern void dump_thread(struct pt_regs *, struct user *);
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extern spinlock_t rtc_lock;
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/* these are C runtime functions with special calling conventions: */
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extern void __divl (void);
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extern void __reml (void);
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extern void __divq (void);
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extern void __remq (void);
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extern void __divlu (void);
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extern void __remlu (void);
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extern void __divqu (void);
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extern void __remqu (void);
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EXPORT_SYMBOL(alpha_mv);
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EXPORT_SYMBOL(enable_irq);
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EXPORT_SYMBOL(disable_irq);
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EXPORT_SYMBOL(disable_irq_nosync);
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EXPORT_SYMBOL(probe_irq_mask);
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EXPORT_SYMBOL(screen_info);
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EXPORT_SYMBOL(perf_irq);
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EXPORT_SYMBOL(callback_getenv);
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EXPORT_SYMBOL(callback_setenv);
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EXPORT_SYMBOL(callback_save_env);
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#ifdef CONFIG_ALPHA_GENERIC
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EXPORT_SYMBOL(alpha_using_srm);
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#endif /* CONFIG_ALPHA_GENERIC */
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/* platform dependent support */
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EXPORT_SYMBOL(strcat);
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EXPORT_SYMBOL(strcmp);
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EXPORT_SYMBOL(strcpy);
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EXPORT_SYMBOL(strlen);
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EXPORT_SYMBOL(strncmp);
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EXPORT_SYMBOL(strncpy);
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EXPORT_SYMBOL(strnlen);
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EXPORT_SYMBOL(strncat);
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EXPORT_SYMBOL(strstr);
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EXPORT_SYMBOL(strpbrk);
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EXPORT_SYMBOL(strchr);
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EXPORT_SYMBOL(strrchr);
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EXPORT_SYMBOL(memcmp);
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EXPORT_SYMBOL(memmove);
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EXPORT_SYMBOL(memscan);
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EXPORT_SYMBOL(__memcpy);
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EXPORT_SYMBOL(__memset);
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EXPORT_SYMBOL(__memsetw);
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EXPORT_SYMBOL(__constant_c_memset);
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EXPORT_SYMBOL(copy_page);
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EXPORT_SYMBOL(clear_page);
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EXPORT_SYMBOL(__direct_map_base);
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EXPORT_SYMBOL(__direct_map_size);
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#ifdef CONFIG_PCI
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EXPORT_SYMBOL(pci_alloc_consistent);
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EXPORT_SYMBOL(pci_free_consistent);
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EXPORT_SYMBOL(pci_map_single);
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EXPORT_SYMBOL(pci_map_page);
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EXPORT_SYMBOL(pci_unmap_single);
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EXPORT_SYMBOL(pci_unmap_page);
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EXPORT_SYMBOL(pci_map_sg);
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EXPORT_SYMBOL(pci_unmap_sg);
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EXPORT_SYMBOL(pci_dma_supported);
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EXPORT_SYMBOL(pci_dac_dma_supported);
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EXPORT_SYMBOL(pci_dac_page_to_dma);
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EXPORT_SYMBOL(pci_dac_dma_to_page);
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EXPORT_SYMBOL(pci_dac_dma_to_offset);
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EXPORT_SYMBOL(alpha_gendev_to_pci);
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#endif
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EXPORT_SYMBOL(dma_set_mask);
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EXPORT_SYMBOL(dump_thread);
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EXPORT_SYMBOL(dump_elf_thread);
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EXPORT_SYMBOL(dump_elf_task);
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EXPORT_SYMBOL(dump_elf_task_fp);
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EXPORT_SYMBOL(hwrpb);
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EXPORT_SYMBOL(start_thread);
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EXPORT_SYMBOL(alpha_read_fp_reg);
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EXPORT_SYMBOL(alpha_read_fp_reg_s);
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EXPORT_SYMBOL(alpha_write_fp_reg);
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EXPORT_SYMBOL(alpha_write_fp_reg_s);
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/* In-kernel system calls. */
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EXPORT_SYMBOL(kernel_thread);
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EXPORT_SYMBOL(sys_open);
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EXPORT_SYMBOL(sys_dup);
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EXPORT_SYMBOL(sys_exit);
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EXPORT_SYMBOL(sys_write);
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EXPORT_SYMBOL(sys_read);
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EXPORT_SYMBOL(sys_lseek);
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EXPORT_SYMBOL(execve);
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EXPORT_SYMBOL(sys_setsid);
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EXPORT_SYMBOL(sys_wait4);
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/* Networking helper routines. */
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EXPORT_SYMBOL(csum_tcpudp_magic);
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EXPORT_SYMBOL(ip_compute_csum);
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EXPORT_SYMBOL(ip_fast_csum);
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EXPORT_SYMBOL(csum_partial_copy_nocheck);
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EXPORT_SYMBOL(csum_partial_copy_from_user);
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EXPORT_SYMBOL(csum_ipv6_magic);
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#ifdef CONFIG_MATHEMU_MODULE
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extern long (*alpha_fp_emul_imprecise)(struct pt_regs *, unsigned long);
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extern long (*alpha_fp_emul) (unsigned long pc);
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EXPORT_SYMBOL(alpha_fp_emul_imprecise);
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EXPORT_SYMBOL(alpha_fp_emul);
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#endif
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#ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
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EXPORT_SYMBOL(__min_ipl);
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#endif
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/*
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* The following are specially called from the uaccess assembly stubs.
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*/
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EXPORT_SYMBOL(__copy_user);
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EXPORT_SYMBOL(__do_clear_user);
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EXPORT_SYMBOL(__strncpy_from_user);
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EXPORT_SYMBOL(__strnlen_user);
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/* Semaphore helper functions. */
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EXPORT_SYMBOL(__down_failed);
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EXPORT_SYMBOL(__down_failed_interruptible);
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EXPORT_SYMBOL(__up_wakeup);
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EXPORT_SYMBOL(down);
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EXPORT_SYMBOL(down_interruptible);
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EXPORT_SYMBOL(down_trylock);
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EXPORT_SYMBOL(up);
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/*
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* SMP-specific symbols.
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*/
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#ifdef CONFIG_SMP
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EXPORT_SYMBOL(synchronize_irq);
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EXPORT_SYMBOL(flush_tlb_mm);
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EXPORT_SYMBOL(flush_tlb_range);
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EXPORT_SYMBOL(flush_tlb_page);
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EXPORT_SYMBOL(smp_imb);
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EXPORT_SYMBOL(cpu_data);
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EXPORT_SYMBOL(smp_num_cpus);
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EXPORT_SYMBOL(smp_call_function);
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EXPORT_SYMBOL(smp_call_function_on_cpu);
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EXPORT_SYMBOL(_atomic_dec_and_lock);
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EXPORT_SYMBOL(cpu_present_mask);
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#endif /* CONFIG_SMP */
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/*
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* NUMA specific symbols
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*/
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#ifdef CONFIG_DISCONTIGMEM
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EXPORT_SYMBOL(node_data);
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#endif /* CONFIG_DISCONTIGMEM */
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EXPORT_SYMBOL(rtc_lock);
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/*
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* The following are special because they're not called
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* explicitly (the C compiler or assembler generates them in
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* response to division operations). Fortunately, their
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* interface isn't gonna change any time soon now, so it's OK
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* to leave it out of version control.
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*/
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# undef memcpy
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# undef memset
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EXPORT_SYMBOL(__divl);
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EXPORT_SYMBOL(__divlu);
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EXPORT_SYMBOL(__divq);
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EXPORT_SYMBOL(__divqu);
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EXPORT_SYMBOL(__reml);
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EXPORT_SYMBOL(__remlu);
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EXPORT_SYMBOL(__remq);
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EXPORT_SYMBOL(__remqu);
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EXPORT_SYMBOL(memcpy);
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EXPORT_SYMBOL(memset);
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EXPORT_SYMBOL(memchr);
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EXPORT_SYMBOL(get_wchan);
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#ifdef CONFIG_ALPHA_IRONGATE
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EXPORT_SYMBOL(irongate_ioremap);
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EXPORT_SYMBOL(irongate_iounmap);
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#endif
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