From: Frederick Lawler <f...@fredlawl.com> Previously pciehp debug messages were enabled by the pciehp_debug module parameter, e.g., by booting with this kernel command line option:
pciehp.pciehp_debug=1 Convert this mechanism to use the generic dynamic debug (dyndbg) feature. After this commit, pciehp debug messages are enabled by building the kernel with CONFIG_DYNAMIC_DEBUG=y and booting with this command line option: dyndbg="file pciehp* +p" The dyndbg facility is much more flexible: messages can be enabled at boot- or run-time based on the file name, function name, line number, message test, etc. See Documentation/admin-guide/dynamic-debug-howto.rst for more details. Link: https://lore.kernel.org/lkml/20190503035946.23608-8-f...@fredlawl.com Signed-off-by: Frederick Lawler <f...@fredlawl.com> [bhelgaas: commit log, comment, remove pciehp_debug parameter] Signed-off-by: Bjorn Helgaas <bhelg...@google.com> --- drivers/pci/hotplug/pciehp.h | 16 ++++++---------- drivers/pci/hotplug/pciehp_core.c | 3 --- 2 files changed, 6 insertions(+), 13 deletions(-) diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index 506e1d923a1f..af5d9f92e6d5 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -29,13 +29,13 @@ extern bool pciehp_poll_mode; extern int pciehp_poll_time; -extern bool pciehp_debug; +/* + * Set CONFIG_DYNAMIC_DEBUG=y and boot with 'dyndbg="file pciehp* +p"' to + * enable debug messages. + */ #define dbg(format, arg...) \ -do { \ - if (pciehp_debug) \ - printk(KERN_DEBUG "%s: " format, MY_NAME, ## arg); \ -} while (0) + pr_debug("%s: " format, MY_NAME, ## arg); #define err(format, arg...) \ printk(KERN_ERR "%s: " format, MY_NAME, ## arg) #define info(format, arg...) \ @@ -44,11 +44,7 @@ do { \ printk(KERN_WARNING "%s: " format, MY_NAME, ## arg) #define ctrl_dbg(ctrl, format, arg...) \ - do { \ - if (pciehp_debug) \ - dev_printk(KERN_DEBUG, &ctrl->pcie->device, \ - format, ## arg); \ - } while (0) + dev_dbg(&ctrl->pcie->device, format, ## arg) #define ctrl_err(ctrl, format, arg...) \ dev_err(&ctrl->pcie->device, format, ## arg) #define ctrl_info(ctrl, format, arg...) \ diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index fc5366b50e95..6ff204c435bf 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -27,7 +27,6 @@ #include "../pci.h" /* Global variables */ -bool pciehp_debug; bool pciehp_poll_mode; int pciehp_poll_time; @@ -35,10 +34,8 @@ int pciehp_poll_time; * not really modular, but the easiest way to keep compat with existing * bootargs behaviour is to continue using module_param here. */ -module_param(pciehp_debug, bool, 0644); module_param(pciehp_poll_mode, bool, 0644); module_param(pciehp_poll_time, int, 0644); -MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not"); MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not"); MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds"); -- 2.21.0.1020.gf2820cf01a-goog
