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2020-07-24uprobes: Change handle_swbp() to send SIGTRAP with si_code=SI_KERNEL, to fix ↵Oleg Nesterov1-1/+1
GDB regression If a tracee is uprobed and it hits int3 inserted by debugger, handle_swbp() does send_sig(SIGTRAP, current, 0) which means si_code == SI_USER. This used to work when this code was written, but then GDB started to validate si_code and now it simply can't use breakpoints if the tracee has an active uprobe: # cat test.c void unused_func(void) { } int main(void) { return 0; } # gcc -g test.c -o test # perf probe -x ./test -a unused_func # perf record -e probe_test:unused_func gdb ./test -ex run GNU gdb (GDB) 10.0.50.20200714-git ... Program received signal SIGTRAP, Trace/breakpoint trap. 0x00007ffff7ddf909 in dl_main () from /lib64/ld-linux-x86-64.so.2 (gdb) The tracee hits the internal breakpoint inserted by GDB to monitor shared library events but GDB misinterprets this SIGTRAP and reports a signal. Change handle_swbp() to use force_sig(SIGTRAP), this matches do_int3_user() and fixes the problem. This is the minimal fix for -stable, arch/x86/kernel/uprobes.c is equally wrong; it should use send_sigtrap(TRAP_TRACE) instead of send_sig(SIGTRAP), but this doesn't confuse GDB and needs another x86-specific patch. Reported-by: Aaron Merey <amerey@redhat.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200723154420.GA32043@redhat.com
2020-07-24sched: Warn if garbage is passed to default_wake_function()Chris Wilson1-0/+1
Since the default_wake_function() passes its flags onto try_to_wake_up(), warn if those flags collide with internal values. Given that the supplied flags are garbage, no repair can be done but at least alert the user to the damage they are causing. In the belief that these errors should be picked up during testing, the warning is only compiled in under CONFIG_SCHED_DEBUG. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: https://lore.kernel.org/r/20200723201042.18861-1-chris@chris-wilson.co.uk
2020-07-24serial: exar: Fix GPIO configuration for Sealevel cards based on XR17V35XMatthew Howell1-1/+11
Sealevel XR17V35X based devices are inoperable on kernel versions 4.11 and above due to a change in the GPIO preconfiguration introduced in commit 7dea8165f1d. This patch fixes this by preconfiguring the GPIO on Sealevel cards to the value (0x00) used prior to commit 7dea8165f1d With GPIOs preconfigured as per commit 7dea8165f1d all ports on Sealevel XR17V35X based devices become stuck in high impedance mode, regardless of dip-switch or software configuration. This causes the device to become effectively unusable. This patch (in various forms) has been distributed to our customers and no issues related to it have been reported. Fixes: 7dea8165f1d6 ("serial: exar: Preconfigure xr17v35x MPIOs as output") Signed-off-by: Matthew Howell <matthew.howell@sealevel.com> Link: https://lore.kernel.org/r/alpine.DEB.2.21.2007221605270.13247@tstest-VirtualBox Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-24drm/nouveau/kms/nv50-: Fix CRC-related compile errors with debugfs disabledLyude Paul1-11/+12
Looks like I made the mistake of forgetting to check whether or not this would build without CONFIG_DEBUG_FS, as the Kbuild bot reported some issues building with tegra_defconfig: In file included from drivers/gpu/drm/nouveau/nouveau_display.c:47: ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_head_crc_late_register’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:106:47: error: parameter name omitted 106 | static inline int nv50_head_crc_late_register(struct nv50_head *) {} | ^~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h:106:54: warning: no return statement in function returning non-void [-Wreturn-type] 106 | static inline int nv50_head_crc_late_register(struct nv50_head *) {} | ^~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_handle_vblank’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:108:57: warning: ‘return’ with a value, in function returning void [-Wreturn-type] 108 | nv50_crc_handle_vblank(struct nv50_head *head) { return 0; } | ^ ./drivers/gpu/drm/nouveau/dispnv50/crc.h:108:1: note: declared here 108 | nv50_crc_handle_vblank(struct nv50_head *head) { return 0; } | ^~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_atomic_check’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:111:23: error: parameter name omitted 111 | nv50_crc_atomic_check(struct nv50_head *, struct nv50_head_atom *, | ^~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h:111:43: error: parameter name omitted 111 | nv50_crc_atomic_check(struct nv50_head *, struct nv50_head_atom *, | ^~~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h:112:9: error: parameter name omitted 112 | struct nv50_head_atom *) {} | ^~~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h:112:16: warning: no return statement in function returning non-void [-Wreturn-type] 112 | struct nv50_head_atom *) {} | ^~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_atomic_stop_reporting’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:114:32: error: parameter name omitted 114 | nv50_crc_atomic_stop_reporting(struct drm_atomic_state *) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_atomic_prepare_notifier_contexts’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:116:43: error: parameter name omitted 116 | nv50_crc_atomic_prepare_notifier_contexts(struct drm_atomic_state *) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_atomic_start_reporting’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:118:33: error: parameter name omitted 118 | nv50_crc_atomic_start_reporting(struct drm_atomic_state *) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_atomic_set’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:120:21: error: parameter name omitted 120 | nv50_crc_atomic_set(struct nv50_head *, struct nv50_head_atom *) {} | ^~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h:120:41: error: parameter name omitted 120 | nv50_crc_atomic_set(struct nv50_head *, struct nv50_head_atom *) {} | ^~~~~~~~~~~~~~~~~~~~~~~ ./drivers/gpu/drm/nouveau/dispnv50/crc.h: In function ‘nv50_crc_atomic_clr’: ./drivers/gpu/drm/nouveau/dispnv50/crc.h:122:21: error: parameter name omitted 122 | nv50_crc_atomic_clr(struct nv50_head *) {} | ^~~~~~~~~~~~~~~~~~ drivers/gpu/drm/nouveau/nouveau_display.c: In function ‘nouveau_framebuffer_new’: drivers/gpu/drm/nouveau/nouveau_display.c:286:15: warning: variable ‘width’ set but not used [-Wunused-but-set-variable] 286 | unsigned int width, height, i; | ^~~~~ So, fix the inline function declarations we use in drm/drivers/gpu/drm/nouveau/dispnv50/crc.h when CONFIG_DEBUG_FS is enabled. Fixes: 12885ecbfe62 ("drm/nouveau/kms/nvd9-: Add CRC support") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2020-07-24drm/nouveau/fence: use NVIDIA's headers for read()Ben Skeggs1-1/+1
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/fence: use NVIDIA's headers for sync()Ben Skeggs5-36/+39
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/fence: use NVIDIA's headers for emit()Ben Skeggs6-21/+100
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/svm: use NVIDIA's headers for migrate_clear()Ben Skeggs1-20/+34
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/svm: use NVIDIA's headers for migrate_copy()Ben Skeggs1-20/+39
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/bo: use NVIDIA's headers for move move()Ben Skeggs5-56/+286
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/bo: use NVIDIA's headers for move init()Ben Skeggs6-7/+285
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/fbcon/nv50-: use NVIDIA's headers for fillrect()Ben Skeggs2-14/+20
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/fbcon/nv50-: use NVIDIA's headers for copyarea()Ben Skeggs2-18/+22
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/fbcon/nv50-: use NVIDIA's headers for imageblit()Ben Skeggs2-18/+22
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/fbcon/nv50-: use NVIDIA's headers for accel_init()Ben Skeggs4-99/+879
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core crc_set_ctx()Ben Skeggs2-2/+2
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core crc_set_src()Ben Skeggs2-21/+30
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_or()Ben Skeggs4-23/+26
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_procamp()Ben Skeggs4-8/+25
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_dither()Ben Skeggs6-22/+42
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_ovly()Ben Skeggs2-11/+11
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_base()Ben Skeggs3-18/+19
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_curs_clr()Ben Skeggs4-7/+21
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_curs_set()Ben Skeggs5-27/+60
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_core_clr()Ben Skeggs2-2/+2
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_core_set()Ben Skeggs3-32/+76
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_olut_clr()Ben Skeggs5-7/+12
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_olut_set()Ben Skeggs6-28/+162
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_mode()Ben Skeggs4-41/+153
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core head_view()Ben Skeggs3-11/+51
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core or_get_caps()Ben Skeggs1-3/+3
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core or_ctrl()Ben Skeggs11-42/+785
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core wndw_owner()Ben Skeggs1-2/+4
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core update()Ben Skeggs2-12/+27
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core ntfy_wait_done()Ben Skeggs2-4/+2
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core caps_init()Ben Skeggs1-1/+1
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core ntfy_init()Ben Skeggs2-5/+7
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for core init()Ben Skeggs6-9/+1261
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw update()Ben Skeggs2-7/+9
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw blend_set()Ben Skeggs2-16/+39
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw scale_set()Ben Skeggs1-3/+10
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw image_clr()Ben Skeggs2-4/+10
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw image_set()Ben Skeggs12-135/+557
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw xlut_clr()Ben Skeggs4-6/+11
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw xlut_set()Ben Skeggs4-28/+42
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw csc_clr()Ben Skeggs2-2/+3
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw csc_set()Ben Skeggs5-4/+296
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw ntfy_wait_begun()Ben Skeggs2-4/+2
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw ntfy_clr()Ben Skeggs2-2/+2
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2020-07-24drm/nouveau/kms/nv50-: use NVIDIA's headers for wndw ntfy_set()Ben Skeggs2-6/+10
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
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