diff mbox series

[52/54] nommu: use flush_icache_user_range in brk and mmap

Message ID	20200608044249.uBaIItegb%akpm@linux-foundation.org (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=PqO3=7V=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CF3C2081A Date: Sun, 07 Jun 2020 21:42:49 -0700 From: Andrew Morton <akpm@linux-foundation.org> To: akpm@linux-foundation.org, geert@linux-m68k.org, gerg@linux-m68k.org, hch@lst.de, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org Subject: [patch 52/54] nommu: use flush_icache_user_range in brk and mmap Message-ID: <20200608044249.uBaIItegb%akpm@linux-foundation.org> In-Reply-To: <20200607212615.b050e41fac139a1e16fe00bd@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	[01/54] mm/page_idle.c: skip offline pages \| expand [01/54] mm/page_idle.c: skip offline pages [02/54] ipc/msg: add missing annotation for freeque() [03/54] ipc/namespace.c: use a work queue to free_ipc [04/54] dynamic_debug: add an option to enable dynamic debug for modules only [05/54] kernel: add panic_on_taint [06/54] xarray.h: correct return code documentation for xa_store_{bh,irq}() [07/54] kernel/sysctl: support setting sysctl parameters from kernel command line [08/54] kernel/sysctl: support handling command line aliases [09/54] kernel/hung_task convert hung_task_panic boot parameter to sysctl [10/54] tools/testing/selftests/sysctl/sysctl.sh: support CONFIG_TEST_SYSCTL=y [11/54] lib/test_sysctl: support testing of sysctl. boot parameter [12/54] kernel/watchdog.c: convert {soft/hard}lockup boot parameters to sysctl aliases [13/54] kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected [14/54] panic: add sysctl to dump all CPUs backtraces on oops event [15/54] kernel/sysctl.c: ignore out-of-range taint bits introduced via kernel.tainted [16/54] mm/gup.c: convert to use get_user_{page\|pages}_fast_only() [17/54] mm/gup: update pin_user_pages.rst for "case 3" (mmu notifiers) [18/54] mm/gup: introduce pin_user_pages_locked() [19/54] mm/gup: frame_vector: convert get_user_pages() --> pin_user_pages() [20/54] mm/gup: documentation fix for pin_user_pages*() APIs [21/54] docs: mm/gup: pin_user_pages.rst: add a "case 5" [22/54] vhost: convert get_user_pages() --> pin_user_pages() [23/54] mm/mmap.c: add more sanity checks to get_unmapped_area() [24/54] mm/mmap.c: do not allow mappings outside of allowed limits [25/54] arm: fix the flush_icache_range arguments in set_fiq_handler [26/54] nds32: unexport flush_icache_page [27/54] powerpc: unexport flush_icache_user_range [28/54] unicore32: remove flush_cache_user_range [29/54] asm-generic: fix the inclusion guards for cacheflush.h [30/54] asm-generic: don't include <linux/mm.h> in cacheflush.h [31/54] asm-generic: improve the flush_dcache_page stub [32/54] alpha: use asm-generic/cacheflush.h [33/54] arm64: use asm-generic/cacheflush.h [34/54] c6x: use asm-generic/cacheflush.h [35/54] hexagon: use asm-generic/cacheflush.h [36/54] ia64: use asm-generic/cacheflush.h [37/54] microblaze: use asm-generic/cacheflush.h [38/54] m68knommu: use asm-generic/cacheflush.h [39/54] openrisc: use asm-generic/cacheflush.h [40/54] powerpc: use asm-generic/cacheflush.h [41/54] riscv: use asm-generic/cacheflush.h [42/54] arm,sparc,unicore32: remove flush_icache_user_range [43/54] mm: rename flush_icache_user_range to flush_icache_user_page [44/54] asm-generic: add a flush_icache_user_range stub [45/54] sh: implement flush_icache_user_range [46/54] xtensa: implement flush_icache_user_range [47/54] arm: rename flush_cache_user_range to flush_icache_user_range [48/54] m68k: implement flush_icache_user_range [49/54] exec: only build read_code when needed [50/54] exec: use flush_icache_user_range in read_code [51/54] binfmt_flat: use flush_icache_user_range [52/54] nommu: use flush_icache_user_range in brk and mmap [53/54] module: move the set_fs hack for flush_icache_range to m68k [54/54] doc: cgroup: update note about conditions when oom killer is invoked

Commit Message

Andrew Morton June 8, 2020, 4:42 a.m. UTC

From: Christoph Hellwig <hch@lst.de>
Subject: nommu: use flush_icache_user_range in brk and mmap

These obviously operate on user addresses.

Link: http://lkml.kernel.org/r/20200515143646.3857579-29-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/nommu.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff mbox series

Patch

--- a/mm/nommu.c~nommu-use-flush_icache_user_range-in-brk-and-mmap
+++ a/mm/nommu.c
@@ -433,7 +433,7 @@  SYSCALL_DEFINE1(brk, unsigned long, brk)
 	/*
 	 * Ok, looks good - let it rip.
 	 */
-	flush_icache_range(mm->brk, brk);
+	flush_icache_user_range(mm->brk, brk);
 	return mm->brk = brk;
 }
 
@@ -1277,7 +1277,7 @@  share:
 	/* we flush the region from the icache only when the first executable
 	 * mapping of it is made  */
 	if (vma->vm_flags & VM_EXEC && !region->vm_icache_flushed) {
-		flush_icache_range(region->vm_start, region->vm_end);
+		flush_icache_user_range(region->vm_start, region->vm_end);
 		region->vm_icache_flushed = true;
 	}