diff mbox series

[v6,bpf-next,4/5] vmalloc: introduce huge_vmalloc_supported

Message ID 20220707223546.4124919-5-song@kernel.org (mailing list archive)
State Awaiting Upstream
Delegated to: BPF
Headers show
Series bpf_prog_pack followup | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR fail PR summary
netdev/tree_selection success Clearly marked for bpf-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 15985 this patch: 15985
netdev/cc_maintainers warning 9 maintainers not CCed: netdev@vger.kernel.org songliubraving@fb.com ast@kernel.org akpm@linux-foundation.org yhs@fb.com john.fastabend@gmail.com kafai@fb.com andrii@kernel.org kpsingh@kernel.org
netdev/build_clang success Errors and warnings before: 2871 this patch: 2871
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 15223 this patch: 15223
netdev/checkpatch warning CHECK: Please use a blank line after function/struct/union/enum declarations
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
bpf/vmtest-bpf-next-VM_Test-1 fail Logs for Kernel LATEST on ubuntu-latest with gcc
bpf/vmtest-bpf-next-VM_Test-2 fail Logs for Kernel LATEST on ubuntu-latest with llvm-15
bpf/vmtest-bpf-next-VM_Test-3 success Logs for Kernel LATEST on z15 with gcc

Commit Message

Song Liu July 7, 2022, 10:35 p.m. UTC 
huge_vmalloc_supported() exposes vmap_allow_huge so that users of vmalloc
APIs could know whether vmalloc will return huge pages.

Suggested-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Song Liu <song@kernel.org>
---
 include/linux/vmalloc.h | 6 ++++++
 mm/vmalloc.c            | 5 +++++
 2 files changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 59d3e1f3e108..aa2182959fc5 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -243,11 +243,17 @@  static inline void set_vm_flush_reset_perms(void *addr)
 	if (vm)
 		vm->flags |= VM_FLUSH_RESET_PERMS;
 }
+bool huge_vmalloc_supported(void);
 
 #else
 static inline void set_vm_flush_reset_perms(void *addr)
 {
 }
+
+static inline bool huge_vmalloc_supported(void)
+{
+	return false;
+}
 #endif
 
 /* for /proc/kcore */
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index effd1ff6a4b4..0a5add4b5b2d 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -72,6 +72,11 @@  early_param("nohugevmalloc", set_nohugevmalloc);
 static const bool vmap_allow_huge = false;
 #endif	/* CONFIG_HAVE_ARCH_HUGE_VMALLOC */
 
+bool huge_vmalloc_supported(void)
+{
+	return vmap_allow_huge;
+}
+
 bool is_vmalloc_addr(const void *x)
 {
 	unsigned long addr = (unsigned long)kasan_reset_tag(x);