#ifndef __ASM_GENERIC_DELAY_H #define __ASM_GENERIC_DELAY_H /* Undefined functions to get compile-time errors */ extern void __bad_udelay(void); extern void __bad_ndelay(void); extern void __udelay(unsigned long usecs); extern void __ndelay(unsigned long nsecs); extern void __const_udelay(unsigned long xloops); extern void __delay(unsigned long loops); /* * The weird n/20000 thing suppresses a "comparison is always false due to * limited range of data type" warning with non-const 8-bit arguments. */ /* 0x10c7 is 2**32 / 1000000 (rounded up) */ #define udelay(n) \ ({ \ if (__builtin_constant_p(n)) { \ if ((n) / 20000 >= 1) \ __bad_udelay(); \ else \ __const_udelay((n) * 0x10c7ul); \ } else { \ __udelay(n); \ } \ }) /* 0x5 is 2**32 / 1000000000 (rounded up) */ #define ndelay(n) \ ({ \ if (__builtin_constant_p(n)) { \ if ((n) / 20000 >= 1) \ __bad_ndelay(); \ else \ __const_udelay((n) * 5ul); \ } else { \ __ndelay(n); \ } \ }) #endif /* __ASM_GENERIC_DELAY_H */ er net-next plumbingsTobias Klauser
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /net/kcm/Kconfig
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'net/kcm/Kconfig')