/* * Copyright 2015, Cyril Bur, IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include "basic_asm.h" #include "fpu_asm.h" FUNC_START(check_fpu) mr r4,r3 li r3,1 # assume a bad result lfd f0,0(r4) fcmpu cr1,f0,f14 bne cr1,1f lfd f0,8(r4) fcmpu cr1,f0,f15 bne cr1,1f lfd f0,16(r4) fcmpu cr1,f0,f16 bne cr1,1f lfd f0,24(r4) fcmpu cr1,f0,f17 bne cr1,1f lfd f0,32(r4) fcmpu cr1,f0,f18 bne cr1,1f lfd f0,40(r4) fcmpu cr1,f0,f19 bne cr1,1f lfd f0,48(r4) fcmpu cr1,f0,f20 bne cr1,1f lfd f0,56(r4) fcmpu cr1,f0,f21 bne cr1,1f lfd f0,64(r4) fcmpu cr1,f0,f22 bne cr1,1f lfd f0,72(r4) fcmpu cr1,f0,f23 bne cr1,1f lfd f0,80(r4) fcmpu cr1,f0,f24 bne cr1,1f lfd f0,88(r4) fcmpu cr1,f0,f25 bne cr1,1f lfd f0,96(r4) fcmpu cr1,f0,f26 bne cr1,1f lfd f0,104(r4) fcmpu cr1,f0,f27 bne cr1,1f lfd f0,112(r4) fcmpu cr1,f0,f28 bne cr1,1f lfd f0,120(r4) fcmpu cr1,f0,f29 bne cr1,1f lfd f0,128(r4) fcmpu cr1,f0,f30 bne cr1,1f lfd f0,136(r4) fcmpu cr1,f0,f31 bne cr1,1f li r3,0 # Success!!! 1: blr FUNC_START(test_fpu) # r3 holds pointer to where to put the result of fork # r4 holds pointer to the pid # f14-f31 are non volatiles PUSH_BASIC_STACK(256) PUSH_FPU(256) std r3,STACK_FRAME_PARAM(0)(sp) # Address of darray std r4,STACK_FRAME_PARAM(1)(sp) # Address of pid bl load_fpu nop li r0,__NR_fork sc # pass the result of the fork to the caller ld r9,STACK_FRAME_PARAM(1)(sp) std r3,0(r9) ld r3,STACK_FRAME_PARAM(0)(sp) bl check_fpu nop POP_FPU(256) POP_BASIC_STACK(256) blr FUNC_END(test_fpu) # int preempt_fpu(double *darray, int *threads_running, int *running) # On starting will (atomically) decrement not_ready as a signal that the FPU # has been loaded with darray. Will proceed to check the validity of the FPU # registers while running is not zero. FUNC_START(preempt_fpu) PUSH_BASIC_STACK(256) PUSH_FPU(256) std r3,STACK_FRAME_PARAM(0)(sp) # double *darray std r4,STACK_FRAME_PARAM(1)(sp) # int *threads_starting std r5,STACK_FRAME_PARAM(2)(sp) # int *running bl load_fpu nop sync # Atomic DEC ld r3,STACK_FRAME_PARAM(1)(sp) 1: lwarx r4,0,r3 addi r4,r4,-1 stwcx. r4,0,r3 bne- 1b 2: ld r3,STACK_FRAME_PARAM(0)(sp) bl check_fpu nop cmpdi r3,0 bne 3f ld r4,STACK_FRAME_PARAM(2)(sp) ld r5,0(r4) cmpwi r5,0 bne 2b 3: POP_FPU(256) POP_BASIC_STACK(256) blr FUNC_END(preempt_fpu) >
path: root/include/soc/tegra/ivc.h
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authorzhong jiang <zhongjiang@huawei.com>2017-01-24 15:18:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:26:14 -0800
commit3277953de2f31dd03c6375e9a9f680ac37fc9d27 (patch)
tree6ba22924faa1b82ef2f0277db10a3f5abdc44157 /include/soc/tegra/ivc.h
parent3705ccfdd1e8b539225ce20e3925a945cc788d67 (diff)
mm: do not export ioremap_page_range symbol for external module
Recently, I've found cases in which ioremap_page_range was used incorrectly, in external modules, leading to crashes. This can be partly attributed to the fact that ioremap_page_range is lower-level, with fewer protections, as compared to the other functions that an external module would typically call. Those include: ioremap_cache ioremap_nocache ioremap_prot ioremap_uc ioremap_wc ioremap_wt ...each of which wraps __ioremap_caller, which in turn provides a safer way to achieve the mapping. Therefore, stop EXPORT-ing ioremap_page_range. Link: http://lkml.kernel.org/r/1485173220-29010-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Suggested-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/soc/tegra/ivc.h')