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kernel-ark/arch/alpha/kernel/alpha_ksyms.c
Ingo Molnar fb1c8f93d8 [PATCH] spinlock consolidation 
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>
2005-09-10 10:06:21 -07:00

227 lines
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/*
* linux/arch/alpha/kernel/ksyms.c
*
* Export the alpha-specific functions that are needed for loadable
* modules.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/user.h>
#include <linux/elfcore.h>
#include <linux/socket.h>
#include <linux/syscalls.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/pci.h>
#include <linux/tty.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/console.h>
#include <asm/hwrpb.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
#include <asm/checksum.h>
#include <linux/interrupt.h>
#include <asm/fpu.h>
#include <asm/irq.h>
#include <asm/machvec.h>
#include <asm/pgalloc.h>
#include <asm/semaphore.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
#include <asm/vga.h>
#define __KERNEL_SYSCALLS__
#include <asm/unistd.h>
extern struct hwrpb_struct *hwrpb;
extern void dump_thread(struct pt_regs *, struct user *);
extern spinlock_t rtc_lock;
/* these are C runtime functions with special calling conventions: */
extern void __divl (void);
extern void __reml (void);
extern void __divq (void);
extern void __remq (void);
extern void __divlu (void);
extern void __remlu (void);
extern void __divqu (void);
extern void __remqu (void);
EXPORT_SYMBOL(alpha_mv);
EXPORT_SYMBOL(enable_irq);
EXPORT_SYMBOL(disable_irq);
EXPORT_SYMBOL(disable_irq_nosync);
EXPORT_SYMBOL(probe_irq_mask);
EXPORT_SYMBOL(screen_info);
EXPORT_SYMBOL(perf_irq);
EXPORT_SYMBOL(callback_getenv);
EXPORT_SYMBOL(callback_setenv);
EXPORT_SYMBOL(callback_save_env);
#ifdef CONFIG_ALPHA_GENERIC
EXPORT_SYMBOL(alpha_using_srm);
#endif /* CONFIG_ALPHA_GENERIC */
/* platform dependent support */
EXPORT_SYMBOL(strcat);
EXPORT_SYMBOL(strcmp);
EXPORT_SYMBOL(strcpy);
EXPORT_SYMBOL(strlen);
EXPORT_SYMBOL(strncmp);
EXPORT_SYMBOL(strncpy);
EXPORT_SYMBOL(strnlen);
EXPORT_SYMBOL(strncat);
EXPORT_SYMBOL(strstr);
EXPORT_SYMBOL(strpbrk);
EXPORT_SYMBOL(strchr);
EXPORT_SYMBOL(strrchr);
EXPORT_SYMBOL(memcmp);
EXPORT_SYMBOL(memmove);
EXPORT_SYMBOL(memscan);
EXPORT_SYMBOL(__memcpy);
EXPORT_SYMBOL(__memset);
EXPORT_SYMBOL(__memsetw);
EXPORT_SYMBOL(__constant_c_memset);
EXPORT_SYMBOL(copy_page);
EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL(__direct_map_base);
EXPORT_SYMBOL(__direct_map_size);
#ifdef CONFIG_PCI
EXPORT_SYMBOL(pci_alloc_consistent);
EXPORT_SYMBOL(pci_free_consistent);
EXPORT_SYMBOL(pci_map_single);
EXPORT_SYMBOL(pci_map_page);
EXPORT_SYMBOL(pci_unmap_single);
EXPORT_SYMBOL(pci_unmap_page);
EXPORT_SYMBOL(pci_map_sg);
EXPORT_SYMBOL(pci_unmap_sg);
EXPORT_SYMBOL(pci_dma_supported);
EXPORT_SYMBOL(pci_dac_dma_supported);
EXPORT_SYMBOL(pci_dac_page_to_dma);
EXPORT_SYMBOL(pci_dac_dma_to_page);
EXPORT_SYMBOL(pci_dac_dma_to_offset);
EXPORT_SYMBOL(alpha_gendev_to_pci);
#endif
EXPORT_SYMBOL(dma_set_mask);
EXPORT_SYMBOL(dump_thread);
EXPORT_SYMBOL(dump_elf_thread);
EXPORT_SYMBOL(dump_elf_task);
EXPORT_SYMBOL(dump_elf_task_fp);
EXPORT_SYMBOL(hwrpb);
EXPORT_SYMBOL(start_thread);
EXPORT_SYMBOL(alpha_read_fp_reg);
EXPORT_SYMBOL(alpha_read_fp_reg_s);
EXPORT_SYMBOL(alpha_write_fp_reg);
EXPORT_SYMBOL(alpha_write_fp_reg_s);
/* In-kernel system calls. */
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(sys_open);
EXPORT_SYMBOL(sys_dup);
EXPORT_SYMBOL(sys_exit);
EXPORT_SYMBOL(sys_write);
EXPORT_SYMBOL(sys_read);
EXPORT_SYMBOL(sys_lseek);
EXPORT_SYMBOL(execve);
EXPORT_SYMBOL(sys_setsid);
EXPORT_SYMBOL(sys_wait4);
/* Networking helper routines. */
EXPORT_SYMBOL(csum_tcpudp_magic);
EXPORT_SYMBOL(ip_compute_csum);
EXPORT_SYMBOL(ip_fast_csum);
EXPORT_SYMBOL(csum_partial_copy_nocheck);
EXPORT_SYMBOL(csum_partial_copy_from_user);
EXPORT_SYMBOL(csum_ipv6_magic);
#ifdef CONFIG_MATHEMU_MODULE
extern long (*alpha_fp_emul_imprecise)(struct pt_regs *, unsigned long);
extern long (*alpha_fp_emul) (unsigned long pc);
EXPORT_SYMBOL(alpha_fp_emul_imprecise);
EXPORT_SYMBOL(alpha_fp_emul);
#endif
#ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
EXPORT_SYMBOL(__min_ipl);
#endif
/*
* The following are specially called from the uaccess assembly stubs.
*/
EXPORT_SYMBOL(__copy_user);
EXPORT_SYMBOL(__do_clear_user);
EXPORT_SYMBOL(__strncpy_from_user);
EXPORT_SYMBOL(__strnlen_user);
/* Semaphore helper functions. */
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_failed_interruptible);
EXPORT_SYMBOL(__up_wakeup);
EXPORT_SYMBOL(down);
EXPORT_SYMBOL(down_interruptible);
EXPORT_SYMBOL(down_trylock);
EXPORT_SYMBOL(up);
/*
* SMP-specific symbols.
*/
#ifdef CONFIG_SMP
EXPORT_SYMBOL(synchronize_irq);
EXPORT_SYMBOL(flush_tlb_mm);
EXPORT_SYMBOL(flush_tlb_range);
EXPORT_SYMBOL(flush_tlb_page);
EXPORT_SYMBOL(smp_imb);
EXPORT_SYMBOL(cpu_data);
EXPORT_SYMBOL(smp_num_cpus);
EXPORT_SYMBOL(smp_call_function);
EXPORT_SYMBOL(smp_call_function_on_cpu);
EXPORT_SYMBOL(_atomic_dec_and_lock);
EXPORT_SYMBOL(cpu_present_mask);
#endif /* CONFIG_SMP */
/*
* NUMA specific symbols
*/
#ifdef CONFIG_DISCONTIGMEM
EXPORT_SYMBOL(node_data);
#endif /* CONFIG_DISCONTIGMEM */
EXPORT_SYMBOL(rtc_lock);
/*
* The following are special because they're not called
* explicitly (the C compiler or assembler generates them in
* response to division operations). Fortunately, their
* interface isn't gonna change any time soon now, so it's OK
* to leave it out of version control.
*/
# undef memcpy
# undef memset
EXPORT_SYMBOL(__divl);
EXPORT_SYMBOL(__divlu);
EXPORT_SYMBOL(__divq);
EXPORT_SYMBOL(__divqu);
EXPORT_SYMBOL(__reml);
EXPORT_SYMBOL(__remlu);
EXPORT_SYMBOL(__remq);
EXPORT_SYMBOL(__remqu);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(memchr);
EXPORT_SYMBOL(get_wchan);
#ifdef CONFIG_ALPHA_IRONGATE
EXPORT_SYMBOL(irongate_ioremap);
EXPORT_SYMBOL(irongate_iounmap);
#endif
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