The patch titled
Subject: mm: support compiling out madvise and fadvise
has been removed from the -mm tree. Its filename was
mm-support-compiling-out-madvise-and-fadvise.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Subject: mm: support compiling out madvise and fadvise
Many embedded systems will not need these syscalls, and omitting them
saves space. Add a new EXPERT config option CONFIG_ADVISE_SYSCALLS
(default y) to support compiling them out.
bloat-o-meter:
add/remove: 0/3 grow/shrink: 0/0 up/down: 0/-2250 (-2250)
function old new delta
sys_fadvise64 57 - -57
sys_fadvise64_64 691 - -691
sys_madvise 1502 - -1502
Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
init/Kconfig | 10 ++++++++++
kernel/sys_ni.c | 3 +++
mm/Makefile | 8 ++++++--
3 files changed, 19 insertions(+), 2 deletions(-)
diff -puN init/Kconfig~mm-support-compiling-out-madvise-and-fadvise init/Kconfig
--- a/init/Kconfig~mm-support-compiling-out-madvise-and-fadvise
+++ a/init/Kconfig
@@ -1526,6 +1526,16 @@ config AIO
by some high performance threaded applications. Disabling
this option saves about 7k.
+config ADVISE_SYSCALLS
+ bool "Enable madvise/fadvise syscalls" if EXPERT
+ default y
+ help
+ This option enables the madvise and fadvise syscalls, used by
+ applications to advise the kernel about their future memory or file
+ usage, improving performance. If building an embedded system where no
+ applications use these syscalls, you can disable this option to save
+ space.
+
config PCI_QUIRKS
default y
bool "Enable PCI quirk workarounds" if EXPERT
diff -puN kernel/sys_ni.c~mm-support-compiling-out-madvise-and-fadvise kernel/sys_ni.c
--- a/kernel/sys_ni.c~mm-support-compiling-out-madvise-and-fadvise
+++ a/kernel/sys_ni.c
@@ -156,6 +156,9 @@ cond_syscall(sys_process_vm_writev);
cond_syscall(compat_sys_process_vm_readv);
cond_syscall(compat_sys_process_vm_writev);
cond_syscall(sys_uselib);
+cond_syscall(sys_fadvise64);
+cond_syscall(sys_fadvise64_64);
+cond_syscall(sys_madvise);
/* arch-specific weak syscall entries */
cond_syscall(sys_pciconfig_read);
diff -puN mm/Makefile~mm-support-compiling-out-madvise-and-fadvise mm/Makefile
--- a/mm/Makefile~mm-support-compiling-out-madvise-and-fadvise
+++ a/mm/Makefile
@@ -3,7 +3,7 @@
#
mmu-y := nommu.o
-mmu-$(CONFIG_MMU) := fremap.o gup.o highmem.o madvise.o memory.o mincore.o \
+mmu-$(CONFIG_MMU) := fremap.o gup.o highmem.o memory.o mincore.o \
mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
vmalloc.o pagewalk.o pgtable-generic.o
@@ -11,7 +11,7 @@ ifdef CONFIG_CROSS_MEMORY_ATTACH
mmu-$(CONFIG_MMU) += process_vm_access.o
endif
-obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
+obj-y := filemap.o mempool.o oom_kill.o \
maccess.o page_alloc.o page-writeback.o \
readahead.o swap.o truncate.o vmscan.o shmem.o \
util.o mmzone.o vmstat.o backing-dev.o \
@@ -28,6 +28,10 @@ else
obj-y += bootmem.o
endif
+obj-$(CONFIG_ADVISE_SYSCALLS) += fadvise.o
+ifdef CONFIG_MMU
+ obj-$(CONFIG_ADVISE_SYSCALLS) += madvise.o
+endif
obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o
_
Patches currently in -mm which might be from josh@xxxxxxxxxxxxxxxx are
efi-bgrt-add-error-handling-inform-the-user-when-ignoring-the-bgrt.patch
signal-use-build_bug-instead-of-_nsig_words_is_unsupported_size.patch
linux-next.patch
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