From: "Luis R. Rodriguez" mcgrof@do-not-panic.com
Turns out a few drivers have strayed away from using the spinlock_t typedef and decided to use struct spinlock directly. This series converts these drivers to use spinlock_t. Each change has been compile tested with allmodconfig and sparse checked. Driver developers may want to look at the compile error output / sparse error report supplied in each commit log, in particular brcmfmac and i915, there are quite a few things that are not related to this change that the developers can clean up / fix.
Luis R. Rodriguez (6): ux500: convert struct spinlock to spinlock_t i915: convert struct spinlock to spinlock_t s5p-fimc: convert struct spinlock to spinlock_t s5p-jpeg: convert struct spinlock to spinlock_t brcmfmac: convert struct spinlock to spinlock_t ie6xx_wdt: convert struct spinlock to spinlock_t
drivers/crypto/ux500/cryp/cryp.h | 4 ++-- drivers/crypto/ux500/hash/hash_alg.h | 4 ++-- drivers/gpu/drm/i915/i915_drv.h | 4 ++-- drivers/media/platform/s5p-fimc/mipi-csis.c | 2 +- drivers/media/platform/s5p-jpeg/jpeg-core.h | 2 +- drivers/net/wireless/brcm80211/brcmfmac/fweh.h | 2 +- drivers/watchdog/ie6xx_wdt.c | 2 +- 7 files changed, 10 insertions(+), 10 deletions(-)
From: "Luis R. Rodriguez" mcgrof@do-not-panic.com
spinlock_t should always be used.
LD drivers/gpu/drm/i915/built-in.o CHECK drivers/gpu/drm/i915/i915_drv.c CC [M] drivers/gpu/drm/i915/i915_drv.o CHECK drivers/gpu/drm/i915/i915_dma.c CC [M] drivers/gpu/drm/i915/i915_dma.o CHECK drivers/gpu/drm/i915/i915_irq.c CC [M] drivers/gpu/drm/i915/i915_irq.o CHECK drivers/gpu/drm/i915/i915_debugfs.c drivers/gpu/drm/i915/i915_debugfs.c:558:31: warning: dereference of noderef expression drivers/gpu/drm/i915/i915_debugfs.c:558:39: warning: dereference of noderef expression drivers/gpu/drm/i915/i915_debugfs.c:558:51: warning: dereference of noderef expression drivers/gpu/drm/i915/i915_debugfs.c:558:63: warning: dereference of noderef expression CC [M] drivers/gpu/drm/i915/i915_debugfs.o CHECK drivers/gpu/drm/i915/i915_suspend.c CC [M] drivers/gpu/drm/i915/i915_suspend.o CHECK drivers/gpu/drm/i915/i915_gem.c drivers/gpu/drm/i915/i915_gem.c:3703:14: warning: incorrect type in assignment (different base types) drivers/gpu/drm/i915/i915_gem.c:3703:14: expected unsigned int [unsigned] [usertype] mask drivers/gpu/drm/i915/i915_gem.c:3703:14: got restricted gfp_t drivers/gpu/drm/i915/i915_gem.c:3706:22: warning: invalid assignment: &= drivers/gpu/drm/i915/i915_gem.c:3706:22: left side has type unsigned int drivers/gpu/drm/i915/i915_gem.c:3706:22: right side has type restricted gfp_t drivers/gpu/drm/i915/i915_gem.c:3707:22: warning: invalid assignment: |= drivers/gpu/drm/i915/i915_gem.c:3707:22: left side has type unsigned int drivers/gpu/drm/i915/i915_gem.c:3707:22: right side has type restricted gfp_t drivers/gpu/drm/i915/i915_gem.c:3711:39: warning: incorrect type in argument 2 (different base types) drivers/gpu/drm/i915/i915_gem.c:3711:39: expected restricted gfp_t [usertype] mask drivers/gpu/drm/i915/i915_gem.c:3711:39: got unsigned int [unsigned] [usertype] mask CC [M] drivers/gpu/drm/i915/i915_gem.o CHECK drivers/gpu/drm/i915/i915_gem_context.c CC [M] drivers/gpu/drm/i915/i915_gem_context.o CHECK drivers/gpu/drm/i915/i915_gem_debug.c CC [M] drivers/gpu/drm/i915/i915_gem_debug.o CHECK drivers/gpu/drm/i915/i915_gem_evict.c CC [M] drivers/gpu/drm/i915/i915_gem_evict.o CHECK drivers/gpu/drm/i915/i915_gem_execbuffer.c CC [M] drivers/gpu/drm/i915/i915_gem_execbuffer.o CHECK drivers/gpu/drm/i915/i915_gem_gtt.c CC [M] drivers/gpu/drm/i915/i915_gem_gtt.o CHECK drivers/gpu/drm/i915/i915_gem_stolen.c CC [M] drivers/gpu/drm/i915/i915_gem_stolen.o CHECK drivers/gpu/drm/i915/i915_gem_tiling.c CC [M] drivers/gpu/drm/i915/i915_gem_tiling.o CHECK drivers/gpu/drm/i915/i915_sysfs.c CC [M] drivers/gpu/drm/i915/i915_sysfs.o CHECK drivers/gpu/drm/i915/i915_trace_points.c CC [M] drivers/gpu/drm/i915/i915_trace_points.o CHECK drivers/gpu/drm/i915/intel_display.c drivers/gpu/drm/i915/intel_display.c:1736:9: warning: mixing different enum types drivers/gpu/drm/i915/intel_display.c:1736:9: int enum transcoder versus drivers/gpu/drm/i915/intel_display.c:1736:9: int enum pipe drivers/gpu/drm/i915/intel_display.c:3659:48: warning: mixing different enum types drivers/gpu/drm/i915/intel_display.c:3659:48: int enum pipe versus drivers/gpu/drm/i915/intel_display.c:3659:48: int enum transcoder CC [M] drivers/gpu/drm/i915/intel_display.o CHECK drivers/gpu/drm/i915/intel_crt.c CC [M] drivers/gpu/drm/i915/intel_crt.o CHECK drivers/gpu/drm/i915/intel_lvds.c CC [M] drivers/gpu/drm/i915/intel_lvds.o CHECK drivers/gpu/drm/i915/intel_bios.c drivers/gpu/drm/i915/intel_bios.c:706:60: warning: incorrect type in initializer (different address spaces) drivers/gpu/drm/i915/intel_bios.c:706:60: expected struct vbt_header *vbt drivers/gpu/drm/i915/intel_bios.c:706:60: got void [noderef] asn:2*vbt drivers/gpu/drm/i915/intel_bios.c:726:42: warning: incorrect type in argument 1 (different address spaces) drivers/gpu/drm/i915/intel_bios.c:726:42: expected void const *<noident> drivers/gpu/drm/i915/intel_bios.c:726:42: got unsigned char [noderef] [usertype] asn:2* drivers/gpu/drm/i915/intel_bios.c:727:40: warning: cast removes address space of expression drivers/gpu/drm/i915/intel_bios.c:738:24: warning: cast removes address space of expression CC [M] drivers/gpu/drm/i915/intel_bios.o CHECK drivers/gpu/drm/i915/intel_ddi.c drivers/gpu/drm/i915/intel_ddi.c:87:6: warning: symbol 'intel_prepare_ddi_buffers' was not declared. Should it be static? drivers/gpu/drm/i915/intel_ddi.c:1036:34: warning: mixing different enum types drivers/gpu/drm/i915/intel_ddi.c:1036:34: int enum pipe versus drivers/gpu/drm/i915/intel_ddi.c:1036:34: int enum transcoder CC [M] drivers/gpu/drm/i915/intel_ddi.o drivers/gpu/drm/i915/intel_ddi.c: In function ‘intel_ddi_setup_hw_pll_state’: drivers/gpu/drm/i915/intel_ddi.c:1129:2: warning: ‘port’ may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/gpu/drm/i915/intel_ddi.c:1111:12: note: ‘port’ was declared here CHECK drivers/gpu/drm/i915/intel_dp.c CC [M] drivers/gpu/drm/i915/intel_dp.o CHECK drivers/gpu/drm/i915/intel_hdmi.c CC [M] drivers/gpu/drm/i915/intel_hdmi.o CHECK drivers/gpu/drm/i915/intel_sdvo.c CC [M] drivers/gpu/drm/i915/intel_sdvo.o CHECK drivers/gpu/drm/i915/intel_modes.c CC [M] drivers/gpu/drm/i915/intel_modes.o CHECK drivers/gpu/drm/i915/intel_panel.c CC [M] drivers/gpu/drm/i915/intel_panel.o CHECK drivers/gpu/drm/i915/intel_pm.c drivers/gpu/drm/i915/intel_pm.c:2173:1: warning: symbol 'mchdev_lock' was not declared. Should it be static? CC [M] drivers/gpu/drm/i915/intel_pm.o CHECK drivers/gpu/drm/i915/intel_i2c.c CC [M] drivers/gpu/drm/i915/intel_i2c.o CHECK drivers/gpu/drm/i915/intel_fb.c CC [M] drivers/gpu/drm/i915/intel_fb.o CHECK drivers/gpu/drm/i915/intel_tv.c CC [M] drivers/gpu/drm/i915/intel_tv.o CHECK drivers/gpu/drm/i915/intel_dvo.c CC [M] drivers/gpu/drm/i915/intel_dvo.o CHECK drivers/gpu/drm/i915/intel_ringbuffer.c CC [M] drivers/gpu/drm/i915/intel_ringbuffer.o CHECK drivers/gpu/drm/i915/intel_overlay.c CC [M] drivers/gpu/drm/i915/intel_overlay.o CHECK drivers/gpu/drm/i915/intel_sprite.c CC [M] drivers/gpu/drm/i915/intel_sprite.o CHECK drivers/gpu/drm/i915/intel_opregion.c CC [M] drivers/gpu/drm/i915/intel_opregion.o CHECK drivers/gpu/drm/i915/dvo_ch7xxx.c CC [M] drivers/gpu/drm/i915/dvo_ch7xxx.o CHECK drivers/gpu/drm/i915/dvo_ch7017.c CC [M] drivers/gpu/drm/i915/dvo_ch7017.o CHECK drivers/gpu/drm/i915/dvo_ivch.c CC [M] drivers/gpu/drm/i915/dvo_ivch.o CHECK drivers/gpu/drm/i915/dvo_tfp410.c CC [M] drivers/gpu/drm/i915/dvo_tfp410.o CHECK drivers/gpu/drm/i915/dvo_sil164.c CC [M] drivers/gpu/drm/i915/dvo_sil164.o CHECK drivers/gpu/drm/i915/dvo_ns2501.c CC [M] drivers/gpu/drm/i915/dvo_ns2501.o CHECK drivers/gpu/drm/i915/i915_gem_dmabuf.c CC [M] drivers/gpu/drm/i915/i915_gem_dmabuf.o CHECK drivers/gpu/drm/i915/i915_ioc32.c CC [M] drivers/gpu/drm/i915/i915_ioc32.o CHECK drivers/gpu/drm/i915/intel_acpi.c CC [M] drivers/gpu/drm/i915/intel_acpi.o LD [M] drivers/gpu/drm/i915/i915.o Building modules, stage 2. MODPOST 1 modules CC drivers/gpu/drm/i915/i915.mod.o LD [M] drivers/gpu/drm/i915/i915.ko
Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Reported-by: Hauke Mehrtens hauke@hauke-m.de Signed-off-by: Luis R. Rodriguez mcgrof@do-not-panic.com --- drivers/gpu/drm/i915/i915_drv.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 4b83e5f..ef5f33c 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -628,7 +628,7 @@ typedef struct drm_i915_private { /** forcewake_count is protected by gt_lock */ unsigned forcewake_count; /** gt_lock is also taken in irq contexts. */ - struct spinlock gt_lock; + spinlock_t gt_lock;
struct intel_gmbus gmbus[GMBUS_NUM_PORTS];
@@ -1128,7 +1128,7 @@ struct drm_i915_gem_request {
struct drm_i915_file_private { struct { - struct spinlock lock; + spinlock_t lock; struct list_head request_list; } mm; struct idr context_idr;
On Thu, Nov 29, 2012 at 12:45:06PM -0800, Luis R. Rodriguez wrote:
From: "Luis R. Rodriguez" mcgrof@do-not-panic.com
spinlock_t should always be used.
LD drivers/gpu/drm/i915/built-in.o CHECK drivers/gpu/drm/i915/i915_drv.c CC [M] drivers/gpu/drm/i915/i915_drv.o CHECK drivers/gpu/drm/i915/i915_dma.c CC [M] drivers/gpu/drm/i915/i915_dma.o CHECK drivers/gpu/drm/i915/i915_irq.c CC [M] drivers/gpu/drm/i915/i915_irq.o CHECK drivers/gpu/drm/i915/i915_debugfs.c drivers/gpu/drm/i915/i915_debugfs.c:558:31: warning: dereference of noderef expression drivers/gpu/drm/i915/i915_debugfs.c:558:39: warning: dereference of noderef expression drivers/gpu/drm/i915/i915_debugfs.c:558:51: warning: dereference of noderef expression drivers/gpu/drm/i915/i915_debugfs.c:558:63: warning: dereference of noderef expression CC [M] drivers/gpu/drm/i915/i915_debugfs.o CHECK drivers/gpu/drm/i915/i915_suspend.c CC [M] drivers/gpu/drm/i915/i915_suspend.o CHECK drivers/gpu/drm/i915/i915_gem.c drivers/gpu/drm/i915/i915_gem.c:3703:14: warning: incorrect type in assignment (different base types) drivers/gpu/drm/i915/i915_gem.c:3703:14: expected unsigned int [unsigned] [usertype] mask drivers/gpu/drm/i915/i915_gem.c:3703:14: got restricted gfp_t drivers/gpu/drm/i915/i915_gem.c:3706:22: warning: invalid assignment: &= drivers/gpu/drm/i915/i915_gem.c:3706:22: left side has type unsigned int drivers/gpu/drm/i915/i915_gem.c:3706:22: right side has type restricted gfp_t drivers/gpu/drm/i915/i915_gem.c:3707:22: warning: invalid assignment: |= drivers/gpu/drm/i915/i915_gem.c:3707:22: left side has type unsigned int drivers/gpu/drm/i915/i915_gem.c:3707:22: right side has type restricted gfp_t drivers/gpu/drm/i915/i915_gem.c:3711:39: warning: incorrect type in argument 2 (different base types) drivers/gpu/drm/i915/i915_gem.c:3711:39: expected restricted gfp_t [usertype] mask drivers/gpu/drm/i915/i915_gem.c:3711:39: got unsigned int [unsigned] [usertype] mask CC [M] drivers/gpu/drm/i915/i915_gem.o CHECK drivers/gpu/drm/i915/i915_gem_context.c CC [M] drivers/gpu/drm/i915/i915_gem_context.o CHECK drivers/gpu/drm/i915/i915_gem_debug.c CC [M] drivers/gpu/drm/i915/i915_gem_debug.o CHECK drivers/gpu/drm/i915/i915_gem_evict.c CC [M] drivers/gpu/drm/i915/i915_gem_evict.o CHECK drivers/gpu/drm/i915/i915_gem_execbuffer.c CC [M] drivers/gpu/drm/i915/i915_gem_execbuffer.o CHECK drivers/gpu/drm/i915/i915_gem_gtt.c CC [M] drivers/gpu/drm/i915/i915_gem_gtt.o CHECK drivers/gpu/drm/i915/i915_gem_stolen.c CC [M] drivers/gpu/drm/i915/i915_gem_stolen.o CHECK drivers/gpu/drm/i915/i915_gem_tiling.c CC [M] drivers/gpu/drm/i915/i915_gem_tiling.o CHECK drivers/gpu/drm/i915/i915_sysfs.c CC [M] drivers/gpu/drm/i915/i915_sysfs.o CHECK drivers/gpu/drm/i915/i915_trace_points.c CC [M] drivers/gpu/drm/i915/i915_trace_points.o CHECK drivers/gpu/drm/i915/intel_display.c drivers/gpu/drm/i915/intel_display.c:1736:9: warning: mixing different enum types drivers/gpu/drm/i915/intel_display.c:1736:9: int enum transcoder versus drivers/gpu/drm/i915/intel_display.c:1736:9: int enum pipe drivers/gpu/drm/i915/intel_display.c:3659:48: warning: mixing different enum types drivers/gpu/drm/i915/intel_display.c:3659:48: int enum pipe versus drivers/gpu/drm/i915/intel_display.c:3659:48: int enum transcoder CC [M] drivers/gpu/drm/i915/intel_display.o CHECK drivers/gpu/drm/i915/intel_crt.c CC [M] drivers/gpu/drm/i915/intel_crt.o CHECK drivers/gpu/drm/i915/intel_lvds.c CC [M] drivers/gpu/drm/i915/intel_lvds.o CHECK drivers/gpu/drm/i915/intel_bios.c drivers/gpu/drm/i915/intel_bios.c:706:60: warning: incorrect type in initializer (different address spaces) drivers/gpu/drm/i915/intel_bios.c:706:60: expected struct vbt_header *vbt drivers/gpu/drm/i915/intel_bios.c:706:60: got void [noderef] asn:2*vbt drivers/gpu/drm/i915/intel_bios.c:726:42: warning: incorrect type in argument 1 (different address spaces) drivers/gpu/drm/i915/intel_bios.c:726:42: expected void const *<noident> drivers/gpu/drm/i915/intel_bios.c:726:42: got unsigned char [noderef] [usertype] asn:2* drivers/gpu/drm/i915/intel_bios.c:727:40: warning: cast removes address space of expression drivers/gpu/drm/i915/intel_bios.c:738:24: warning: cast removes address space of expression CC [M] drivers/gpu/drm/i915/intel_bios.o CHECK drivers/gpu/drm/i915/intel_ddi.c drivers/gpu/drm/i915/intel_ddi.c:87:6: warning: symbol 'intel_prepare_ddi_buffers' was not declared. Should it be static? drivers/gpu/drm/i915/intel_ddi.c:1036:34: warning: mixing different enum types drivers/gpu/drm/i915/intel_ddi.c:1036:34: int enum pipe versus drivers/gpu/drm/i915/intel_ddi.c:1036:34: int enum transcoder CC [M] drivers/gpu/drm/i915/intel_ddi.o drivers/gpu/drm/i915/intel_ddi.c: In function ‘intel_ddi_setup_hw_pll_state’: drivers/gpu/drm/i915/intel_ddi.c:1129:2: warning: ‘port’ may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/gpu/drm/i915/intel_ddi.c:1111:12: note: ‘port’ was declared here CHECK drivers/gpu/drm/i915/intel_dp.c CC [M] drivers/gpu/drm/i915/intel_dp.o CHECK drivers/gpu/drm/i915/intel_hdmi.c CC [M] drivers/gpu/drm/i915/intel_hdmi.o CHECK drivers/gpu/drm/i915/intel_sdvo.c CC [M] drivers/gpu/drm/i915/intel_sdvo.o CHECK drivers/gpu/drm/i915/intel_modes.c CC [M] drivers/gpu/drm/i915/intel_modes.o CHECK drivers/gpu/drm/i915/intel_panel.c CC [M] drivers/gpu/drm/i915/intel_panel.o CHECK drivers/gpu/drm/i915/intel_pm.c drivers/gpu/drm/i915/intel_pm.c:2173:1: warning: symbol 'mchdev_lock' was not declared. Should it be static? CC [M] drivers/gpu/drm/i915/intel_pm.o CHECK drivers/gpu/drm/i915/intel_i2c.c CC [M] drivers/gpu/drm/i915/intel_i2c.o CHECK drivers/gpu/drm/i915/intel_fb.c CC [M] drivers/gpu/drm/i915/intel_fb.o CHECK drivers/gpu/drm/i915/intel_tv.c CC [M] drivers/gpu/drm/i915/intel_tv.o CHECK drivers/gpu/drm/i915/intel_dvo.c CC [M] drivers/gpu/drm/i915/intel_dvo.o CHECK drivers/gpu/drm/i915/intel_ringbuffer.c CC [M] drivers/gpu/drm/i915/intel_ringbuffer.o CHECK drivers/gpu/drm/i915/intel_overlay.c CC [M] drivers/gpu/drm/i915/intel_overlay.o CHECK drivers/gpu/drm/i915/intel_sprite.c CC [M] drivers/gpu/drm/i915/intel_sprite.o CHECK drivers/gpu/drm/i915/intel_opregion.c CC [M] drivers/gpu/drm/i915/intel_opregion.o CHECK drivers/gpu/drm/i915/dvo_ch7xxx.c CC [M] drivers/gpu/drm/i915/dvo_ch7xxx.o CHECK drivers/gpu/drm/i915/dvo_ch7017.c CC [M] drivers/gpu/drm/i915/dvo_ch7017.o CHECK drivers/gpu/drm/i915/dvo_ivch.c CC [M] drivers/gpu/drm/i915/dvo_ivch.o CHECK drivers/gpu/drm/i915/dvo_tfp410.c CC [M] drivers/gpu/drm/i915/dvo_tfp410.o CHECK drivers/gpu/drm/i915/dvo_sil164.c CC [M] drivers/gpu/drm/i915/dvo_sil164.o CHECK drivers/gpu/drm/i915/dvo_ns2501.c CC [M] drivers/gpu/drm/i915/dvo_ns2501.o CHECK drivers/gpu/drm/i915/i915_gem_dmabuf.c CC [M] drivers/gpu/drm/i915/i915_gem_dmabuf.o CHECK drivers/gpu/drm/i915/i915_ioc32.c CC [M] drivers/gpu/drm/i915/i915_ioc32.o CHECK drivers/gpu/drm/i915/intel_acpi.c CC [M] drivers/gpu/drm/i915/intel_acpi.o LD [M] drivers/gpu/drm/i915/i915.o Building modules, stage 2. MODPOST 1 modules CC drivers/gpu/drm/i915/i915.mod.o LD [M] drivers/gpu/drm/i915/i915.ko
Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Reported-by: Hauke Mehrtens hauke@hauke-m.de Signed-off-by: Luis R. Rodriguez mcgrof@do-not-panic.com
Queued for -next (3.9), thanks for the patch. -Daniel
On 11/29/2012 09:45 PM, Luis R. Rodriguez wrote:
From: "Luis R. Rodriguez" mcgrof@do-not-panic.com
Turns out a few drivers have strayed away from using the spinlock_t typedef and decided to use struct spinlock directly. This series converts these drivers to use spinlock_t. Each change has been compile tested with allmodconfig and sparse checked. Driver developers may want to look at the compile error output / sparse error report supplied in each commit log, in particular brcmfmac and i915, there are quite a few things that are not related to this change that the developers can clean up / fix.
So what is the rationale here. During mainlining our drivers we had to remove all uses of 'typedef struct foo foo_t;'. The Linux CodingStyle (chapter 5 Typedefs) is spending a number of lines explaining why.
So is spinlock_t an exception to this rule simply because the kernel uses spinlock_t all over the place. Using Greg's favorite final email remark:
Confused.
Gr. AvS
Luis R. Rodriguez (6): ux500: convert struct spinlock to spinlock_t i915: convert struct spinlock to spinlock_t s5p-fimc: convert struct spinlock to spinlock_t s5p-jpeg: convert struct spinlock to spinlock_t brcmfmac: convert struct spinlock to spinlock_t ie6xx_wdt: convert struct spinlock to spinlock_t
drivers/crypto/ux500/cryp/cryp.h | 4 ++-- drivers/crypto/ux500/hash/hash_alg.h | 4 ++-- drivers/gpu/drm/i915/i915_drv.h | 4 ++-- drivers/media/platform/s5p-fimc/mipi-csis.c | 2 +- drivers/media/platform/s5p-jpeg/jpeg-core.h | 2 +- drivers/net/wireless/brcm80211/brcmfmac/fweh.h | 2 +- drivers/watchdog/ie6xx_wdt.c | 2 +- 7 files changed, 10 insertions(+), 10 deletions(-)
On Fri, Nov 30, 2012 at 12:38 AM, Arend van Spriel arend@broadcom.com wrote:
So what is the rationale here. During mainlining our drivers we had to remove all uses of 'typedef struct foo foo_t;'. The Linux CodingStyle (chapter 5 Typedefs) is spending a number of lines explaining why.
So is spinlock_t an exception to this rule simply because the kernel uses spinlock_t all over the place.
Yes.
Luis
On Fri, Nov 30, 2012 at 11:18 AM, Luis R. Rodriguez mcgrof@do-not-panic.com wrote:
On Fri, Nov 30, 2012 at 12:38 AM, Arend van Spriel arend@broadcom.com wrote:
So what is the rationale here. During mainlining our drivers we had to remove all uses of 'typedef struct foo foo_t;'. The Linux CodingStyle (chapter 5 Typedefs) is spending a number of lines explaining why.
So is spinlock_t an exception to this rule simply because the kernel uses spinlock_t all over the place.
Yes.
Let me provide a better explanation. In practice drivers should not be creating their own typedefs given that generally the reasons to create them do not exist for drivers. The kernel may provide their own though for reasons explained in CodingStyle and in such cases the drivers should use these supplied typedefs.
Luis
On 11/30/2012 09:25 PM, Luis R. Rodriguez wrote:
On Fri, Nov 30, 2012 at 11:18 AM, Luis R. Rodriguez mcgrof@do-not-panic.com wrote:
On Fri, Nov 30, 2012 at 12:38 AM, Arend van Spriel arend@broadcom.com wrote:
So what is the rationale here. During mainlining our drivers we had to remove all uses of 'typedef struct foo foo_t;'. The Linux CodingStyle (chapter 5 Typedefs) is spending a number of lines explaining why.
So is spinlock_t an exception to this rule simply because the kernel uses spinlock_t all over the place.
Yes.
Let me provide a better explanation. In practice drivers should not be creating their own typedefs given that generally the reasons to create them do not exist for drivers. The kernel may provide their own though for reasons explained in CodingStyle and in such cases the drivers should use these supplied typedefs.
Ok. Fine by me. It just looked like a case of saying a and doing b. Thanks for taking time giving the better explanation :-)
Gr. AvS
dri-devel@lists.freedesktop.org
-
Arend van Spriel -
Daniel Vetter -
Luis R. Rodriguez