[PATCH] compiler-gcc: integrate the various compiler-gcc[345].h files #4
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Signed-off-by: Herman van Hazendonk <github.com@herrie.org>
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Pushed. |
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Why didn't you use the upstream patch for this I've mentioned on IRC few days ago? |
shr-project
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that referenced
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Jun 2, 2019
Fix null pointer access inside msm camera
shr-project
pushed a commit
that referenced
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Apr 7, 2021
When we try to open a file with O_TMPFILE flag, we will trigger a bug.
The root cause is that in ext4_orphan_add() we check ->i_nlink == 0 and
this check always fails because we set ->i_nlink = 1 in
inode_init_always(). We can use the following program to trigger it:
int main(int argc, char *argv[])
{
int fd;
fd = open(argv[1], O_TMPFILE, 0666);
if (fd < 0) {
perror("open ");
return -1;
}
close(fd);
return 0;
}
The oops message looks like this:
kernel: kernel BUG at fs/ext3/namei.c:1992!
kernel: invalid opcode: 0000 [#1] SMP
kernel: Modules linked in: ext4 jbd2 crc16 cpufreq_ondemand ipv6 dm_mirror dm_region_hash dm_log dm_mod parport_pc parport serio_raw sg dcdbas pcspkr i2c_i801 ehci_pci ehci_hcd button acpi_cpufreq mperf e1000e ptp pps_core ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core ext3 jbd sd_mod ahci libahci libata scsi_mod uhci_hcd
kernel: CPU: 0 PID: 2882 Comm: tst_tmpfile Not tainted 3.11.0-rc1+ #4
kernel: Hardware name: Dell Inc. OptiPlex 780 /0V4W66, BIOS A05 08/11/2010
kernel: task: ffff880112d30050 ti: ffff8801124d4000 task.ti: ffff8801124d4000
kernel: RIP: 0010:[<ffffffffa00db5ae>] [<ffffffffa00db5ae>] ext3_orphan_add+0x6a/0x1eb [ext3]
kernel: RSP: 0018:ffff8801124d5cc8 EFLAGS: 00010202
kernel: RAX: 0000000000000000 RBX: ffff880111510128 RCX: ffff8801114683a0
kernel: RDX: 0000000000000000 RSI: ffff880111510128 RDI: ffff88010fcf65a8
kernel: RBP: ffff8801124d5d18 R08: 0080000000000000 R09: ffffffffa00d3b7f
kernel: R10: ffff8801114683a0 R11: ffff8801032a2558 R12: 0000000000000000
kernel: R13: ffff88010fcf6800 R14: ffff8801032a2558 R15: ffff8801115100d8
kernel: FS: 00007f5d172b5700(0000) GS:ffff880117c00000(0000) knlGS:0000000000000000
kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
kernel: CR2: 00007f5d16df15d0 CR3: 0000000110b1d000 CR4: 00000000000407f0
kernel: Stack:
kernel: 000000000000000c ffff8801048a7dc8 ffff8801114685a8 ffffffffa00b80d7
kernel: ffff8801124d5e38 ffff8801032a2558 ffff88010ce24d68 0000000000000000
kernel: ffff88011146b300 ffff8801124d5d44 ffff8801124d5d78 ffffffffa00db7e1
kernel: Call Trace:
kernel: [<ffffffffa00b80d7>] ? journal_start+0x8c/0xbd [jbd]
kernel: [<ffffffffa00db7e1>] ext3_tmpfile+0xb2/0x13b [ext3]
kernel: [<ffffffff821076f8>] path_openat+0x11f/0x5e7
kernel: [<ffffffff821c86b4>] ? list_del+0x11/0x30
kernel: [<ffffffff82065fa2>] ? __dequeue_entity+0x33/0x38
kernel: [<ffffffff82107cd5>] do_filp_open+0x3f/0x8d
kernel: [<ffffffff82112532>] ? __alloc_fd+0x50/0x102
kernel: [<ffffffff820f9296>] do_sys_open+0x13b/0x1cd
kernel: [<ffffffff820f935c>] SyS_open+0x1e/0x20
kernel: [<ffffffff82398c02>] system_call_fastpath+0x16/0x1b
kernel: Code: 39 c7 0f 85 67 01 00 00 0f b7 03 25 00 f0 00 00 3d 00 40 00 00 74 18 3d 00 80 00 00 74 11 3d 00 a0 00 00 74 0a 83 7b 48 00 74 04 <0f> 0b eb fe 49 8b 85 50 03 00 00 4c 89 f6 48 c7 c7 c0 99 0e a0
kernel: RIP [<ffffffffa00db5ae>] ext3_orphan_add+0x6a/0x1eb [ext3]
kernel: RSP <ffff8801124d5cc8>
Here we couldn't call clear_nlink() directly because in d_tmpfile() we
will call inode_dec_link_count() to decrease ->i_nlink. So this commit
tries to call d_tmpfile() before ext4_orphan_add() to fix this problem.
Change-Id: I7c71cb75eaa579fd85d37dd8b1d22cb843d48361
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
shr-project
pushed a commit
that referenced
this pull request
Apr 7, 2021
We can end up allocating a new compression stream with GFP_KERNEL from
within the IO path, which may result is nested (recursive) IO operations.
That can introduce problems if the IO path in question is a reclaimer,
holding some locks that will deadlock nested IOs.
Allocate streams and working memory using GFP_NOIO flag, forbidding
recursive IO and FS operations.
An example:
[ 747.233722] inconsistent {IN-RECLAIM_FS-W} -> {RECLAIM_FS-ON-W} usage.
[ 747.233724] git/20158 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 747.233725] (jbd2_handle){+.+.?.}, at: [<ffffffff811e31db>] start_this_handle+0x4ca/0x555
[ 747.233733] {IN-RECLAIM_FS-W} state was registered at:
[ 747.233735] [<ffffffff8107b8e9>] __lock_acquire+0x8da/0x117b
[ 747.233738] [<ffffffff8107c950>] lock_acquire+0x10c/0x1a7
[ 747.233740] [<ffffffff811e323e>] start_this_handle+0x52d/0x555
[ 747.233742] [<ffffffff811e331a>] jbd2__journal_start+0xb4/0x237
[ 747.233744] [<ffffffff811cc6c7>] __ext4_journal_start_sb+0x108/0x17e
[ 747.233748] [<ffffffff811a90bf>] ext4_dirty_inode+0x32/0x61
[ 747.233750] [<ffffffff8115f37e>] __mark_inode_dirty+0x16b/0x60c
[ 747.233754] [<ffffffff81150ad6>] iput+0x11e/0x274
[ 747.233757] [<ffffffff8114bfbd>] __dentry_kill+0x148/0x1b8
[ 747.233759] [<ffffffff8114c9d9>] shrink_dentry_list+0x274/0x44a
[ 747.233761] [<ffffffff8114d38a>] prune_dcache_sb+0x4a/0x55
[ 747.233763] [<ffffffff8113b1ad>] super_cache_scan+0xfc/0x176
[ 747.233767] [<ffffffff810fa089>] shrink_slab.part.14.constprop.25+0x2a2/0x4d3
[ 747.233770] [<ffffffff810fcccb>] shrink_zone+0x74/0x140
[ 747.233772] [<ffffffff810fd924>] kswapd+0x6b7/0x930
[ 747.233774] [<ffffffff81058887>] kthread+0x107/0x10f
[ 747.233778] [<ffffffff814fadff>] ret_from_fork+0x3f/0x70
[ 747.233783] irq event stamp: 138297
[ 747.233784] hardirqs last enabled at (138297): [<ffffffff8107aff3>] debug_check_no_locks_freed+0x113/0x12f
[ 747.233786] hardirqs last disabled at (138296): [<ffffffff8107af13>] debug_check_no_locks_freed+0x33/0x12f
[ 747.233788] softirqs last enabled at (137818): [<ffffffff81040f89>] __do_softirq+0x2d3/0x3e9
[ 747.233792] softirqs last disabled at (137813): [<ffffffff81041292>] irq_exit+0x41/0x95
[ 747.233794]
other info that might help us debug this:
[ 747.233796] Possible unsafe locking scenario:
[ 747.233797] CPU0
[ 747.233798] ----
[ 747.233799] lock(jbd2_handle);
[ 747.233801] <Interrupt>
[ 747.233801] lock(jbd2_handle);
[ 747.233803]
*** DEADLOCK ***
[ 747.233805] 5 locks held by git/20158:
[ 747.233806] #0: (sb_writers#7){.+.+.+}, at: [<ffffffff81155411>] mnt_want_write+0x24/0x4b
[ 747.233811] #1: (&type->i_mutex_dir_key#2/1){+.+.+.}, at: [<ffffffff81145087>] lock_rename+0xd9/0xe3
[ 747.233817] #2: (&sb->s_type->i_mutex_key#11){+.+.+.}, at: [<ffffffff8114f8e2>] lock_two_nondirectories+0x3f/0x6b
[ 747.233822] #3: (&sb->s_type->i_mutex_key#11/4){+.+.+.}, at: [<ffffffff8114f909>] lock_two_nondirectories+0x66/0x6b
[ 747.233827] #4: (jbd2_handle){+.+.?.}, at: [<ffffffff811e31db>] start_this_handle+0x4ca/0x555
[ 747.233831]
stack backtrace:
[ 747.233834] CPU: 2 PID: 20158 Comm: git Not tainted 4.1.0-rc7-next-20150615-dbg-00016-g8bdf555-dirty torvalds#211
[ 747.233837] ffff8800a56cea40 ffff88010d0a75f8 ffffffff814f446d ffffffff81077036
[ 747.233840] ffffffff823a84b0 ffff88010d0a7638 ffffffff814f3849 0000000000000001
[ 747.233843] 000000000000000a ffff8800a56cf6f8 ffff8800a56cea40 ffffffff810795dd
[ 747.233846] Call Trace:
[ 747.233849] [<ffffffff814f446d>] dump_stack+0x4c/0x6e
[ 747.233852] [<ffffffff81077036>] ? up+0x39/0x3e
[ 747.233854] [<ffffffff814f3849>] print_usage_bug.part.23+0x25b/0x26a
[ 747.233857] [<ffffffff810795dd>] ? print_shortest_lock_dependencies+0x182/0x182
[ 747.233859] [<ffffffff8107a9c9>] mark_lock+0x384/0x56d
[ 747.233862] [<ffffffff8107ac11>] mark_held_locks+0x5f/0x76
[ 747.233865] [<ffffffffa023d2f3>] ? zcomp_strm_alloc+0x25/0x73 [zram]
[ 747.233867] [<ffffffff8107d13b>] lockdep_trace_alloc+0xb2/0xb5
[ 747.233870] [<ffffffff8112bac7>] kmem_cache_alloc_trace+0x32/0x1e2
[ 747.233873] [<ffffffffa023d2f3>] zcomp_strm_alloc+0x25/0x73 [zram]
[ 747.233876] [<ffffffffa023d428>] zcomp_strm_multi_find+0xe7/0x173 [zram]
[ 747.233879] [<ffffffffa023d58b>] zcomp_strm_find+0xc/0xe [zram]
[ 747.233881] [<ffffffffa023f292>] zram_bvec_rw+0x2ca/0x7e0 [zram]
[ 747.233885] [<ffffffffa023fa8c>] zram_make_request+0x1fa/0x301 [zram]
[ 747.233889] [<ffffffff812142f8>] generic_make_request+0x9c/0xdb
[ 747.233891] [<ffffffff8121442e>] submit_bio+0xf7/0x120
[ 747.233895] [<ffffffff810f1c0c>] ? __test_set_page_writeback+0x1a0/0x1b8
[ 747.233897] [<ffffffff811a9d00>] ext4_io_submit+0x2e/0x43
[ 747.233899] [<ffffffff811a9efa>] ext4_bio_write_page+0x1b7/0x300
[ 747.233902] [<ffffffff811a2106>] mpage_submit_page+0x60/0x77
[ 747.233905] [<ffffffff811a25b0>] mpage_map_and_submit_buffers+0x10f/0x21d
[ 747.233907] [<ffffffff811a6814>] ext4_writepages+0xc8c/0xe1b
[ 747.233910] [<ffffffff810f3f77>] do_writepages+0x23/0x2c
[ 747.233913] [<ffffffff810ea5d1>] __filemap_fdatawrite_range+0x84/0x8b
[ 747.233915] [<ffffffff810ea657>] filemap_flush+0x1c/0x1e
[ 747.233917] [<ffffffff811a3851>] ext4_alloc_da_blocks+0xb8/0x117
[ 747.233919] [<ffffffff811af52a>] ext4_rename+0x132/0x6dc
[ 747.233921] [<ffffffff8107ac11>] ? mark_held_locks+0x5f/0x76
[ 747.233924] [<ffffffff811afafd>] ext4_rename2+0x29/0x2b
[ 747.233926] [<ffffffff811427ea>] vfs_rename+0x540/0x636
[ 747.233928] [<ffffffff81146a01>] SyS_renameat2+0x359/0x44d
[ 747.233931] [<ffffffff81146b26>] SyS_rename+0x1e/0x20
[ 747.233933] [<ffffffff814faa17>] entry_SYSCALL_64_fastpath+0x12/0x6f
[minchan@kernel.org: add stable mark]
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Kyeongdon Kim <kyeongdon.kim@lge.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
shr-project
pushed a commit
that referenced
this pull request
Jan 24, 2022
When we try to open a file with O_TMPFILE flag, we will trigger a bug.
The root cause is that in ext4_orphan_add() we check ->i_nlink == 0 and
this check always fails because we set ->i_nlink = 1 in
inode_init_always(). We can use the following program to trigger it:
int main(int argc, char *argv[])
{
int fd;
fd = open(argv[1], O_TMPFILE, 0666);
if (fd < 0) {
perror("open ");
return -1;
}
close(fd);
return 0;
}
The oops message looks like this:
kernel: kernel BUG at fs/ext3/namei.c:1992!
kernel: invalid opcode: 0000 [#1] SMP
kernel: Modules linked in: ext4 jbd2 crc16 cpufreq_ondemand ipv6 dm_mirror dm_region_hash dm_log dm_mod parport_pc parport serio_raw sg dcdbas pcspkr i2c_i801 ehci_pci ehci_hcd button acpi_cpufreq mperf e1000e ptp pps_core ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core ext3 jbd sd_mod ahci libahci libata scsi_mod uhci_hcd
kernel: CPU: 0 PID: 2882 Comm: tst_tmpfile Not tainted 3.11.0-rc1+ #4
kernel: Hardware name: Dell Inc. OptiPlex 780 /0V4W66, BIOS A05 08/11/2010
kernel: task: ffff880112d30050 ti: ffff8801124d4000 task.ti: ffff8801124d4000
kernel: RIP: 0010:[<ffffffffa00db5ae>] [<ffffffffa00db5ae>] ext3_orphan_add+0x6a/0x1eb [ext3]
kernel: RSP: 0018:ffff8801124d5cc8 EFLAGS: 00010202
kernel: RAX: 0000000000000000 RBX: ffff880111510128 RCX: ffff8801114683a0
kernel: RDX: 0000000000000000 RSI: ffff880111510128 RDI: ffff88010fcf65a8
kernel: RBP: ffff8801124d5d18 R08: 0080000000000000 R09: ffffffffa00d3b7f
kernel: R10: ffff8801114683a0 R11: ffff8801032a2558 R12: 0000000000000000
kernel: R13: ffff88010fcf6800 R14: ffff8801032a2558 R15: ffff8801115100d8
kernel: FS: 00007f5d172b5700(0000) GS:ffff880117c00000(0000) knlGS:0000000000000000
kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
kernel: CR2: 00007f5d16df15d0 CR3: 0000000110b1d000 CR4: 00000000000407f0
kernel: Stack:
kernel: 000000000000000c ffff8801048a7dc8 ffff8801114685a8 ffffffffa00b80d7
kernel: ffff8801124d5e38 ffff8801032a2558 ffff88010ce24d68 0000000000000000
kernel: ffff88011146b300 ffff8801124d5d44 ffff8801124d5d78 ffffffffa00db7e1
kernel: Call Trace:
kernel: [<ffffffffa00b80d7>] ? journal_start+0x8c/0xbd [jbd]
kernel: [<ffffffffa00db7e1>] ext3_tmpfile+0xb2/0x13b [ext3]
kernel: [<ffffffff821076f8>] path_openat+0x11f/0x5e7
kernel: [<ffffffff821c86b4>] ? list_del+0x11/0x30
kernel: [<ffffffff82065fa2>] ? __dequeue_entity+0x33/0x38
kernel: [<ffffffff82107cd5>] do_filp_open+0x3f/0x8d
kernel: [<ffffffff82112532>] ? __alloc_fd+0x50/0x102
kernel: [<ffffffff820f9296>] do_sys_open+0x13b/0x1cd
kernel: [<ffffffff820f935c>] SyS_open+0x1e/0x20
kernel: [<ffffffff82398c02>] system_call_fastpath+0x16/0x1b
kernel: Code: 39 c7 0f 85 67 01 00 00 0f b7 03 25 00 f0 00 00 3d 00 40 00 00 74 18 3d 00 80 00 00 74 11 3d 00 a0 00 00 74 0a 83 7b 48 00 74 04 <0f> 0b eb fe 49 8b 85 50 03 00 00 4c 89 f6 48 c7 c7 c0 99 0e a0
kernel: RIP [<ffffffffa00db5ae>] ext3_orphan_add+0x6a/0x1eb [ext3]
kernel: RSP <ffff8801124d5cc8>
Here we couldn't call clear_nlink() directly because in d_tmpfile() we
will call inode_dec_link_count() to decrease ->i_nlink. So this commit
tries to call d_tmpfile() before ext4_orphan_add() to fix this problem.
Change-Id: I7c71cb75eaa579fd85d37dd8b1d22cb843d48361
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
shr-project
pushed a commit
that referenced
this pull request
Jan 24, 2022
This moves ARM over to the asm-generic/unaligned.h header. This has the
benefit of better code generated especially for ARMv7 on gcc 4.7+
compilers.
As Arnd Bergmann, points out: The asm-generic version uses the "struct"
version for native-endian unaligned access and the "byteshift" version
for the opposite endianess. The current ARM version however uses the
"byteshift" implementation for both.
Thanks to Nicolas Pitre for the excellent analysis:
Test case:
int foo (int *x) { return get_unaligned(x); }
long long bar (long long *x) { return get_unaligned(x); }
With the current ARM version:
foo:
ldrb r3, [r0, #2] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 2B], MEM[(const u8 *)x_1(D) + 2B]
ldrb r1, [r0, #1] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 1B], MEM[(const u8 *)x_1(D) + 1B]
ldrb r2, [r0, #0] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D)], MEM[(const u8 *)x_1(D)]
mov r3, r3, asl torvalds#16 @ tmp154, MEM[(const u8 *)x_1(D) + 2B],
ldrb r0, [r0, #3] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 3B], MEM[(const u8 *)x_1(D) + 3B]
orr r3, r3, r1, asl #8 @, tmp155, tmp154, MEM[(const u8 *)x_1(D) + 1B],
orr r3, r3, r2 @ tmp157, tmp155, MEM[(const u8 *)x_1(D)]
orr r0, r3, r0, asl torvalds#24 @,, tmp157, MEM[(const u8 *)x_1(D) + 3B],
bx lr @
bar:
stmfd sp!, {r4, r5, r6, r7} @,
mov r2, #0 @ tmp184,
ldrb r5, [r0, #6] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 6B], MEM[(const u8 *)x_1(D) + 6B]
ldrb r4, [r0, #5] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 5B], MEM[(const u8 *)x_1(D) + 5B]
ldrb ip, [r0, #2] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 2B], MEM[(const u8 *)x_1(D) + 2B]
ldrb r1, [r0, #4] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 4B], MEM[(const u8 *)x_1(D) + 4B]
mov r5, r5, asl torvalds#16 @ tmp175, MEM[(const u8 *)x_1(D) + 6B],
ldrb r7, [r0, #1] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 1B], MEM[(const u8 *)x_1(D) + 1B]
orr r5, r5, r4, asl #8 @, tmp176, tmp175, MEM[(const u8 *)x_1(D) + 5B],
ldrb r6, [r0, #7] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 7B], MEM[(const u8 *)x_1(D) + 7B]
orr r5, r5, r1 @ tmp178, tmp176, MEM[(const u8 *)x_1(D) + 4B]
ldrb r4, [r0, #0] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D)], MEM[(const u8 *)x_1(D)]
mov ip, ip, asl torvalds#16 @ tmp188, MEM[(const u8 *)x_1(D) + 2B],
ldrb r1, [r0, #3] @ zero_extendqisi2 @ MEM[(const u8 *)x_1(D) + 3B], MEM[(const u8 *)x_1(D) + 3B]
orr ip, ip, r7, asl #8 @, tmp189, tmp188, MEM[(const u8 *)x_1(D) + 1B],
orr r3, r5, r6, asl torvalds#24 @,, tmp178, MEM[(const u8 *)x_1(D) + 7B],
orr ip, ip, r4 @ tmp191, tmp189, MEM[(const u8 *)x_1(D)]
orr ip, ip, r1, asl torvalds#24 @, tmp194, tmp191, MEM[(const u8 *)x_1(D) + 3B],
mov r1, r3 @,
orr r0, r2, ip @ tmp171, tmp184, tmp194
ldmfd sp!, {r4, r5, r6, r7}
bx lr
In both cases the code is slightly suboptimal. One may wonder why
wasting r2 with the constant 0 in the second case for example. And all
the mov's could be folded in subsequent orr's, etc.
Now with the asm-generic version:
foo:
ldr r0, [r0, #0] @ unaligned @,* x
bx lr @
bar:
mov r3, r0 @ x, x
ldr r0, [r0, #0] @ unaligned @,* x
ldr r1, [r3, #4] @ unaligned @,
bx lr @
This is way better of course, but only because this was compiled for
ARMv7. In this case the compiler knows that the hardware can do
unaligned word access. This isn't that obvious for foo(), but if we
remove the get_unaligned() from bar as follows:
long long bar (long long *x) {return *x; }
then the resulting code is:
bar:
ldmia r0, {r0, r1} @ x,,
bx lr @
So this proves that the presumed aligned vs unaligned cases does have
influence on the instructions the compiler may use and that the above
unaligned code results are not just an accident.
Still... this isn't fully conclusive without at least looking at the
resulting assembly fron a pre ARMv6 compilation. Let's see with an
ARMv5 target:
foo:
ldrb r3, [r0, #0] @ zero_extendqisi2 @ tmp139,* x
ldrb r1, [r0, #1] @ zero_extendqisi2 @ tmp140,
ldrb r2, [r0, #2] @ zero_extendqisi2 @ tmp143,
ldrb r0, [r0, #3] @ zero_extendqisi2 @ tmp146,
orr r3, r3, r1, asl #8 @, tmp142, tmp139, tmp140,
orr r3, r3, r2, asl torvalds#16 @, tmp145, tmp142, tmp143,
orr r0, r3, r0, asl torvalds#24 @,, tmp145, tmp146,
bx lr @
bar:
stmfd sp!, {r4, r5, r6, r7} @,
ldrb r2, [r0, #0] @ zero_extendqisi2 @ tmp139,* x
ldrb r7, [r0, #1] @ zero_extendqisi2 @ tmp140,
ldrb r3, [r0, #4] @ zero_extendqisi2 @ tmp149,
ldrb r6, [r0, #5] @ zero_extendqisi2 @ tmp150,
ldrb r5, [r0, #2] @ zero_extendqisi2 @ tmp143,
ldrb r4, [r0, #6] @ zero_extendqisi2 @ tmp153,
ldrb r1, [r0, #7] @ zero_extendqisi2 @ tmp156,
ldrb ip, [r0, #3] @ zero_extendqisi2 @ tmp146,
orr r2, r2, r7, asl #8 @, tmp142, tmp139, tmp140,
orr r3, r3, r6, asl #8 @, tmp152, tmp149, tmp150,
orr r2, r2, r5, asl torvalds#16 @, tmp145, tmp142, tmp143,
orr r3, r3, r4, asl torvalds#16 @, tmp155, tmp152, tmp153,
orr r0, r2, ip, asl torvalds#24 @,, tmp145, tmp146,
orr r1, r3, r1, asl torvalds#24 @,, tmp155, tmp156,
ldmfd sp!, {r4, r5, r6, r7}
bx lr
Compared to the initial results, this is really nicely optimized and I
couldn't do much better if I were to hand code it myself.
Change-Id: I91ea5a5e83de4bbdbb53883fe0dbf00719a8e382
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
shr-project
pushed a commit
that referenced
this pull request
Aug 15, 2024
[ 3.648013] ------------[ cut here ]------------ [ 3.655981] WARNING: CPU: 3 PID: 161 at drivers/clk/qcom/clk-branch.c:91 clk_branch_toggle+0x180/0x18c [ 3.665341] mmss_s0_axi_clk status stuck at 'off' [ 3.665344] Modules linked in: qnoc_msm8974(+) icc_smd_rpm pm8941_pwrkey [ 3.665366] CPU: 3 PID: 161 Comm: modprobe Tainted: G W 5.6.0-rc6 #4-postmarketos-qcom-msm8974 [ 3.665372] Hardware name: Generic DT based system [ 3.678462] [<c0312f68>] (unwind_backtrace) from [<c030d85c>] (show_stack+0x10/0x14) [ 3.690096] [<c030d85c>] (show_stack) from [<c0c60020>] (dump_stack+0x84/0x98) [ 3.704585] [<c0c60020>] (dump_stack) from [<c03225c4>] (__warn+0xd0/0xf8) [ 3.704603] [<c03225c4>] (__warn) from [<c03229a0>] (warn_slowpath_fmt+0x98/0xc4) [ 3.715610] [<c03229a0>] (warn_slowpath_fmt) from [<c07612c8>] (clk_branch_toggle+0x180/0x18c) [ 3.715630] [<c07612c8>] (clk_branch_toggle) from [<c0751d40>] (clk_core_enable+0x7c/0x304) [ 3.715643] [<c0751d40>] (clk_core_enable) from [<c0751fe0>] (clk_core_enable_lock+0x18/0x2c) [ 3.727584] [<c0751fe0>] (clk_core_enable_lock) from [<c074fd58>] (clk_bulk_enable+0x20/0x70) [ 3.727612] [<c074fd58>] (clk_bulk_enable) from [<bf01012c>] (msm8974_icc_probe+0xf0/0x2b8 [qnoc_msm8974]) [ 3.727640] [<bf01012c>] (msm8974_icc_probe [qnoc_msm8974]) from [<c086dfd4>] (platform_drv_probe+0x48/0x98) [ 3.737573] [<c086dfd4>] (platform_drv_probe) from [<c086ba54>] (really_probe+0x24c/0x484) [ 3.737586] [<c086ba54>] (really_probe) from [<c086be58>] (driver_probe_device+0x78/0x1c8) [ 3.737597] [<c086be58>] (driver_probe_device) from [<c086c208>] (device_driver_attach+0x58/0x60) [ 3.737609] [<c086c208>] (device_driver_attach) from [<c086c2c4>] (__driver_attach+0xb4/0x154) [ 3.750159] [<c086c2c4>] (__driver_attach) from [<c0869a40>] (bus_for_each_dev+0x78/0xc0) [ 3.766825] [<c0869a40>] (bus_for_each_dev) from [<c086aba8>] (bus_add_driver+0x170/0x20c) [ 3.766836] [<c086aba8>] (bus_add_driver) from [<c086cea0>] (driver_register+0x7c/0x114) [ 3.766852] [<c086cea0>] (driver_register) from [<c0302fb4>] (do_one_initcall+0x58/0x2b0) [ 3.779156] [<c0302fb4>] (do_one_initcall) from [<c03aee7c>] (do_init_module+0x60/0x248) [ 3.797384] [<c03aee7c>] (do_init_module) from [<c03b13d4>] (load_module+0x22ec/0x2780) [ 3.797395] [<c03b13d4>] (load_module) from [<c03b1b14>] (sys_finit_module+0xe8/0x120) [ 3.797408] [<c03b1b14>] (sys_finit_module) from [<c0301000>] (ret_fast_syscall+0x0/0x54) [ 3.812306] Exception stack(0xed11ffa8 to 0xed11fff0) [ 3.812330] ffa0: 9b5e880c b6f46550 00000003 00564b94 00000000 b6f48570 [ 3.828641] ffc0: 9b5e880c b6f46550 0000017b 0000017b b6f48570 00000001 00000000 005786a0 [ 3.828657] ffe0: b6f48570 be914be0 004e0205 b6ef90ba [ 3.837947] l17: supplied by vreg-boost [ 3.846065] ---[ end trace c7b2c6d72ddc2c20 ]--- -- Same solution, different commit: SoMainline@0946916 TODO! Proper solution is CLK_IS_CRITICAL on mmss_s0_axi instead of this, like on 8994 (apparently)
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Signed-off-by: Herman van Hazendonk github.com@herrie.org