Merge tag 'perf_urgent_for_v5.18_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov: - Add Sapphire Rapids CPU support - Fix a perf vmalloc-ed buffer mapping error (PERF_USE_VMALLOC in use) * tag 'perf_urgent_for_v5.18_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/cstate: Add SAPPHIRERAPIDS_X CPU support perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled

Linus Torvalds committed 4 years ago

Commit f48ffef2 parents b877ca4 528c9f14 files · +10 −9Browse files

Showing the changes to kernel (3 of 4 files). Show all

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3 files

kernel/events/core.c +1 −1
kernel/events/internal.h +5 −0
kernel/events/ring_buffer.c +0 −5

kernel/events/core.c+1−1

@@ -6247,7 +6247,7 @@ static int perf_mmap(struct file file, struct vm_area_struct vma) · 6246 unmodified lines
6247	6247	again:
6248	6248	mutex_lock(&event->mmap_mutex);
6249	6249	if (event->rb) {
6250		− if (event->rb->nr_pages != nr_pages) {
	6250	+ if (data_page_nr(event->rb) != nr_pages) {
6251	6251	ret = -EINVAL;
6252	6252	goto unlock;
6253	6253	}

kernel/events/internal.h+5−0

@@ -116,6 +116,11 @@ static inline int page_order(struct perf_buffer *rb) · 115 unmodified lines
116	116	}
117	117	#endif
118	118
	119	+static inline int data_page_nr(struct perf_buffer *rb)
	120	+{
	121	+ return rb->nr_pages << page_order(rb);
	122	+}
	123	+
119	124	static inline unsigned long perf_data_size(struct perf_buffer *rb)
120	125	{
121	126	return rb->nr_pages << (PAGE_SHIFT + page_order(rb));

kernel/events/ring_buffer.c+0−5

@@ -859,11 +859,6 @@ void rb_free(struct perf_buffer *rb) · 858 unmodified lines
859	859	}
860	860
861	861	#else
862		−static int data_page_nr(struct perf_buffer *rb)
863		−{
864		− return rb->nr_pages << page_order(rb);
865		−}
866		−
867	862	static struct page *
868	863	__perf_mmap_to_page(struct perf_buffer *rb, unsigned long pgoff)
869	864	{