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* x86/kernel: Audit and remove any unnecessary uses of module.hPaul Gortmaker2016-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. Build testing revealed some implicit header usage that was fixed up accordingly. Note that some bool/obj-y instances remain since module.h is the header for some exception table entry stuff, and for things like __init_or_module (code that is tossed when MODULES=n). Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160714001901.31603-4-paul.gortmaker@windriver.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usageBorislav Petkov2016-04-13
| | | | | | | | | | | | | | | | | Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: iommu@lists.linux-foundation.org Cc: linux-pm@vger.kernel.org Cc: oprofile-list@lists.sf.net Link: http://lkml.kernel.org/r/1459801503-15600-8-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/apic: Deinline __default_send_IPI_*, save ~200 bytesDenys Vlasenko2016-03-08
| | | | | | | | | | | | | | | | | | | | __default_send_IPI_shortcut: 49 bytes, 2 callsites __default_send_IPI_dest_field: 108 bytes, 7 callsites text data bss dec hex filename 96184086 20860488 36122624 153167198 921255e vmlinux_before 96183823 20860520 36122624 153166967 9212477 vmlinux Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Borislav Petkov <bp@alien.de> Cc: Daniel J Blueman <daniel@numascale.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Travis <travis@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1457287876-6001-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/apic: Provide default send single IPI wrapperThomas Gleixner2015-11-05
| | | | | | | | | | | | | | Instead of doing the wrapping in the smp code we can provide a default wrapper for those APICs which insist on cpumasks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Borislav Petkov <bp@alien.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Travis <travis@sgi.com> Cc: Daniel J Blueman <daniel@numascale.com> Link: http://lkml.kernel.org/r/20151104220849.631111846@linutronix.de
* x86/apic: Implement default single target IPI functionThomas Gleixner2015-11-05
| | | | | | | | | | | | | apic_physflat and bigsmp_apic can share that implementation. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Borislav Petkov <bp@alien.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Travis <travis@sgi.com> Cc: Daniel J Blueman <daniel@numascale.com> Link: http://lkml.kernel.org/r/20151104220848.898543767@linutronix.de
* x86: Delete non-required instances of include <linux/init.h>Paul Gortmaker2014-01-07
| | | | | | | | | | | | | None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. [ hpa: undid incorrect removal from arch/x86/kernel/head_32.S ] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Link: http://lkml.kernel.org/r/1389054026-12947-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86/apic: Remove noisy zero-mask warning from default_send_IPI_mask_logical()Dave Jones2013-01-24
| | | | | | | | | | | | | | | | | Since circa 3.5, we've had dozens of reports of people hitting this warning. Forwarded reports have been met with silence, so just remove the warning if no-one cares. Example reports: https://bugzilla.redhat.com/show_bug.cgi?id=797687 https://bugzilla.redhat.com/show_bug.cgi?id=867174 https://bugzilla.redhat.com/show_bug.cgi?id=894865 Signed-off-by: Dave Jones <davej@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20130118175847.GA27662@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86: Always use x86_cpu_to_logical_apicid for cpu -> logical apic idTejun Heo2011-01-28
| | | | | | | | | | | | | | | | | | | | | | | Currently, cpu -> logical apic id translation is done by apic->cpu_to_logical_apicid() callback which may or may not use x86_cpu_to_logical_apicid. This is unnecessary as it should always equal logical_smp_processor_id() which is known early during CPU bring up. Initialize x86_cpu_to_logical_apicid after apic->init_apic_ldr() in setup_local_APIC() and always use x86_cpu_to_logical_apicid for cpu -> logical apic id mapping. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: eric.dumazet@gmail.com Cc: yinghai@kernel.org Cc: brgerst@gmail.com Cc: gorcunov@gmail.com Cc: penberg@kernel.org Cc: shaohui.zheng@intel.com Cc: rientjes@google.com LKML-Reference: <1295789862-25482-6-git-send-email-tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: Make default_send_IPI_mask_sequence/allbutself_logical() 32bit onlyTejun Heo2011-01-28
| | | | | | | | | | | | | | | | | | | | Both functions are used only in 32bit. Put them inside CONFIG_X86_32. This is to prepare for logical apicid handling update. - Cyrill Gorcunov spotted that I forgot to move declarations in ipi.h under CONFIG_X86_32. Fixed. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Pekka Enberg <penberg@kernel.org> Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Cc: eric.dumazet@gmail.com Cc: brgerst@gmail.com Cc: shaohui.zheng@intel.com Cc: rientjes@google.com LKML-Reference: <1295789862-25482-4-git-send-email-tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge commit 'v2.6.31-rc7' into x86/cleanupsIngo Molnar2009-08-24
|\ | | | | | | | | | | Merge reason: we were on -rc1 before - go up to -rc7 Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: don't send an IPI to the empty set of CPU'sLinus Torvalds2009-08-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The default_send_IPI_mask_logical() function uses the "flat" APIC mode to send an IPI to a set of CPU's at once, but if that set happens to be empty, some older local APIC's will apparently be rather unhappy. So just warn if a caller gives us an empty mask, and ignore it. This fixes a regression in 2.6.30.x, due to commit 4595f9620 ("x86: change flush_tlb_others to take a const struct cpumask"), documented here: http://bugzilla.kernel.org/show_bug.cgi?id=13933 which causes a silent lock-up. It only seems to happen on PPro, P2, P3 and Athlon XP cores. Most developers sadly (or not so sadly, if you're a developer..) have more modern CPU's. Also, on x86-64 we don't use the flat APIC mode, so it would never trigger there even if the APIC didn't like sending an empty IPI mask. Reported-by: Pavel Vilim <wylda@volny.cz> Reported-and-tested-by: Thomas Björnell <thomas.bjornell@gmail.com> Reported-and-tested-by: Martin Rogge <marogge@onlinehome.de> Cc: Mike Travis <travis@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | x86, ipi: Clean up safe_smp_processor_id() by using the cpu_has_apic() macro ↵Cyrill Gorcunov2009-07-10
|/ | | | | | | | | | | | helper We already use a lot of cpu_has_ helpers. Lets do here the same for consistency. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <20090705160154.GB4791@lenovo> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, apic: move APIC drivers to arch/x86/kernel/apic/*Ingo Molnar2009-02-17
arch/x86/kernel/ is getting a bit crowded, and the APIC drivers are scattered into various different files. Move them to arch/x86/kernel/apic/*, and also remove the 'gen' prefix from those which had it. Also move APIC related functionality: the IO-APIC driver, the NMI and the IPI code. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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