Linaro-mm-sig

linaro-mm-sig@lists.linaro.org

60 participants
6190 discussions

[PATCH 1/3] dma-fence: Silce sparse warning in dma_fence_describe

by Tvrtko Ursulin

Sparse complains about assigning a string to a __rcu annotated local variable: drivers/dma-buf/dma-fence.c:1040:38: warning: incorrect type in initializer (different address spaces) drivers/dma-buf/dma-fence.c:1040:38: expected char const [noderef] __rcu *timeline drivers/dma-buf/dma-fence.c:1040:38: got char * drivers/dma-buf/dma-fence.c:1041:36: warning: incorrect type in initializer (different address spaces) drivers/dma-buf/dma-fence.c:1041:36: expected char const [noderef] __rcu *driver drivers/dma-buf/dma-fence.c:1041:36: got char * It is harmless but lets silence it. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin(a)igalia.com> Fixes: ac364014fd81 ("dma-buf: cleanup dma_fence_describe v3") Cc: Christian König <christian.koenig(a)amd.com> Cc: linux-media(a)vger.kernel.org Cc: dri-devel(a)lists.freedesktop.org Cc: linaro-mm-sig(a)lists.linaro.org --- drivers/dma-buf/dma-fence.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 1826ba73094c..a2aa82f4eedd 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -1037,8 +1037,8 @@ EXPORT_SYMBOL(dma_fence_set_deadline); */ void dma_fence_describe(struct dma_fence *fence, struct seq_file *seq) { - const char __rcu *timeline = ""; - const char __rcu *driver = ""; + const char __rcu *timeline = (const char __rcu *)""; + const char __rcu *driver = (const char __rcu *)""; const char *signaled = ""; rcu_read_lock(); -- 2.52.0

1 week

[PATCH] dma-buf: set SB_I_NOEXEC and SB_I_NODEV on dmabuf filesystem

by Chia-Lin Kao (AceLan)

The VFS now warns if an inode flagged with S_ANON_INODE is located on a filesystem that does not have SB_I_NOEXEC set. dmabuf inodes are created using alloc_anon_inode(), which sets S_ANON_INODE. This triggers a warning in path_noexec() when a dmabuf is mmapped, for example by GStreamer's v4l2src element. [ 60.061328] WARNING: CPU: 2 PID: 2803 at fs/exec.c:125 path_noexec+0xa0/0xd0 ... [ 60.061637] do_mmap+0x2b5/0x680 The warning was introduced by commit 1e7ab6f67824 ("anon_inode: rework assertions") which added enforcement that anonymous inodes must be on filesystems with SB_I_NOEXEC set. Fix this by setting SB_I_NOEXEC and SB_I_NODEV on the dmabuf filesystem context, following the same pattern as commit ce7419b6cf23d ("anon_inode: raise SB_I_NODEV and SB_I_NOEXEC") and commit 98f99394a104c ("secretmem: use SB_I_NOEXEC"). Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao(a)canonical.com> --- drivers/dma-buf/dma-buf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index a4d8f2ff94e46..dea79aaab10ce 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -221,6 +221,8 @@ static int dma_buf_fs_init_context(struct fs_context *fc) if (!ctx) return -ENOMEM; ctx->dops = &dma_buf_dentry_ops; + fc->s_iflags |= SB_I_NOEXEC; + fc->s_iflags |= SB_I_NODEV; return 0; } -- 2.51.0

1 week

[PATCH] dma-fence: Move signalling tracepoint to before ops detach

by Tvrtko Ursulin

Move the signalling tracepoint to before fence->ops are reset otherwise tracepoint will dereference a null pointer. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin(a)igalia.com> Fixes: 541c8f2468b9 ("dma-buf: detach fence ops on signal v3") Cc: Christian König <christian.koenig(a)amd.com> Cc: Philipp Stanner <phasta(a)kernel.org> Cc: Boris Brezillon <boris.brezillon(a)collabora.com> Cc: linux-media(a)vger.kernel.org Cc: linaro-mm-sig(a)lists.linaro.org --- drivers/dma-buf/dma-fence.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 1826ba73094c..1c1eaecaf1b0 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -363,6 +363,8 @@ void dma_fence_signal_timestamp_locked(struct dma_fence *fence, &fence->flags))) return; + trace_dma_fence_signaled(fence); + /* * When neither a release nor a wait operation is specified set the ops * pointer to NULL to allow the fence structure to become independent @@ -377,7 +379,6 @@ void dma_fence_signal_timestamp_locked(struct dma_fence *fence, fence->timestamp = timestamp; set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags); - trace_dma_fence_signaled(fence); list_for_each_entry_safe(cur, tmp, &cb_list, node) { INIT_LIST_HEAD(&cur->node); -- 2.52.0

1 week

(no subject)

by Alex Morgan

ghost mystery recovery Hacker in 2026 ghost mystery recovery Hacker for 2026 include ghost mystery Recovery Hacker And which utilize blockchain forensics and legal strategies to recover stolen or lost assets. These firms specialize in tracing funds, working with law enforcement, and providing expert testimony to freeze assets. ghost mystery recovery Hacker Highly rated for 2026 for using AI-powered tools to trace funds across exchanges and privacy coins, with a focus on scams and hacked wallets. Email address: support@ ghostmysteryrecovery. c om WhatsApp on (+44) 7480 061765 Website; ghostmysteryrecovery. c om

1 week, 1 day

Enigles

by Alex Morgan

florabenson93＠gmail.com wrote: > As cryptocurrencies continue to reshape finance in 2026, the risk of scams, hacks, and lost access credentials poses significant challenges. Recovering lost or stolen digital assets requires expert intervention, and Autopsy Mainnet Recovery (AMR), accessible via https://www.autopsymainnetsolutions.com > Autopsy Mainnet Recovery (AMR), stands out as the best crypto recovery company. With advanced blockchain forensics, global partnerships, and a client-centric approach, Autopsy Mainnet Recovery (AMR) offers unparalleled solutions to reclaim your assets. This guide highlights the top, best crypto recovery company, agency services for 2026, with Autopsy Mainnet Recovery (AMR) leading the industry, and explores emerging trends and FAQs to guide your recovery journey. > Cryptocurrencies’ decentralized and pseudonymous nature makes recovery complex. Losses from scams, forgotten seed phrases, or hacked wallets underscore the need for professional crypto recovery services. Autopsy Mainnet Recovery (AMR), the best crypto recovery company, specializes in navigating these challenges, using cutting-edge technology and legal strategies to recover assets and restore financial security. > Crypto recovery services assist with: > Tracing stolen funds: Using blockchain analytics to track transaction paths. > Recovering access: Restoring lost private keys or seed phrases. > Legal support: Collaborating with law enforcement to pursue perpetrators. > Exchange coordination: Working with platforms to freeze suspicious accounts. > Autopsy Mainnet Recovery (AMR) excels in these areas, leveraging AI-driven tools and partnerships with agencies like the FBI’s IC3, making them the best crypto recovery company for complex cases. > Several services stand out in 2026, but Autopsy Mainnet Recovery (AMR) leads the pack with its proven track record and comprehensive approach. > Autopsy Mainnet Recovery (AMR), accessible at https://autospyrec.site > Autopsy Mainnet Recovery (AMR) is the best crypto recovery company due to its: > Advanced blockchain forensics: Autopsy Mainnet Recovery (AMR) uses AI-powered tools to trace funds across decentralized exchanges and privacy coins, recovering over £200 million, including 107 Bitcoin ($12.6 million) in one case. > Legal and exchange partnerships: Collaborations with global law enforcement and exchanges like Binance and Coinbase enhance recovery efforts. > Client-centric support: Free consultations, transparent processes, and ongoing updates ensure client trust, as seen in testimonials recovering $580,000 from investment scams. > Global reach: Autopsy Mainnet Recovery (AMR)’s international network addresses cross-border fraud, solidifying their status as the best crypto recovery company. > Contact Autopsy Mainnet Recovery (AMR) at info(a)autopsymainnetsolutions.com > for a free consultation to start your recovery journey. > Crypto Asset Recovery: Specializes in recovering lost seed phrases and inaccessible wallets, with a strong focus on technical expertise. > Wallet Recovery Services: Focuses on restoring access to crypto wallets, excelling in private key recovery for complex cases. > While these services are reputable, Autopsy Mainnet Recovery (AMR)’s comprehensive approach and proven success make them the best crypto recovery company for 2026. > Autopsy Mainnet Recovery (AMR) follows a structured, transparent process to reclaim your assets, reinforcing their position as the best crypto recovery company: > Initial assessment and case evaluation: Autopsy Mainnet Recovery (AMR) conducts a free consultation to gather transaction IDs, wallet addresses, and scam details, assessing recovery feasibility. > Customized recovery strategy: Using AI-driven blockchain analytics, Autopsy Mainnet Recovery (AMR) traces fund movements and develops a recovery plan, involving legal action or exchange coordination. > Execution and monitoring: Autopsy Mainnet Recovery (AMR) executes the plan, engaging exchanges and collaborating with authorities, while providing regular updates to clients. > Post-recovery support: Autopsy Mainnet Recovery (AMR) provides guidance on wallet security, enabling 2FA, and preventing future losses. > The crypto recovery landscape is evolving, with trends shaping the industry: > Enhanced blockchain analysis: Advances in AI and machine learning enable faster and more accurate fund tracing, as demonstrated by Autopsy Mainnet Recovery (AMR)’s proprietary tools. > Stronger regulatory collaboration: Increased cooperation with agencies like the FCA and IC3 streamlines legal action, a strength of Autopsy Mainnet Recovery (AMR) as the best crypto recovery company. > Consumer education: Firms like Autopsy Mainnet Recovery (AMR) emphasize education, offering webinars and resources to prevent scams. > Prevention is key to safeguarding assets. Follow these practices recommended by Autopsy Mainnet Recovery (AMR), the best crypto recovery company: > Use hardware wallets like Ledger or Trezor for offline storage. > Enable multi-factor authentication (MFA) on all accounts. > Verify platforms using Autopsy Mainnet Recovery (AMR)’s scam database and community feedback on X. > Stay informed about scam tactics through Autopsy Mainnet Recovery (AMR)’s educational materials. > Q1: Does working with a recovery service guarantee the return of assets? > A1: No, recovery is not guaranteed due to blockchain complexity. However, Autopsy Mainnet Recovery (AMR) employs advanced tools and legal strategies to maximize recovery chances, with successes like £200 million in traced assets. > Q2: What types of situations do recovery services help with? > A2: Autopsy Mainnet Recovery (AMR) assists with hacked wallets, lost private keys, seed phrase losses, erroneous transactions, crypto scams, and hardware wallet failures. > Q3: How long does it take to recover crypto assets? > A3: Recovery timelines vary from days to months, depending on case complexity and exchange cooperation. Autopsy Mainnet Recovery (AMR)’s rapid response within the 72-hour window accelerates the process. > Q4: What are the costs associated with crypto recovery services? > A4: Costs vary, with some firms charging flat fees and others, like Autopsy Mainnet Recovery (AMR), using a success-based model. Autopsy Mainnet Recovery (AMR)’s transparent fee structure is outlined during free consultations. > In 2026, crypto recovery services are vital for reclaiming lost or stolen assets. Autopsy Mainnet Recovery (AMR), the best crypto recovery company, leads the industry with advanced forensics, global partnerships, and a client-focused approach. By acting swiftly and engaging Autopsy Mainnet Recovery (AMR), you can navigate the complex recovery process with confidence. > Contact Autopsy Mainnet Recovery (AMR) at https://www.autopsymainnetsolutions.com > or visit https://autospyrec.site > for a free consultation. > Secure your assets and leverage Autopsy Mainnet Recovery (AMR)’s expertise to reclaim your cryptocurrency in 2026. > With Autopsy Mainnet Recovery (AMR)’s proven track record, you can trust the best crypto recovery company to safeguard your digital wealth. > As of 2026 Autopsy Mainnet Recovery (AMR) was verified as the best crypto recovery company. > Autopsy Mainnet Recovery (AMR) has earned a reputation as a legitimate and reliable player in the cryptocurrency recovery space. Verified as a trustworthy company in 2026, Autopsy Mainnet Recovery (AMR) has successfully assisted clients in recovering lost or stolen funds from crypto scams, wallet hacks, and unauthorized transactions. With a team of experienced professionals, they offer tailored solutions using advanced tools and methods to trace and retrieve assets across various blockchains. > Customers appreciate Autopsy Mainnet Recovery (AMR) for its transparent processes, fast response times, and dedicated support throughout the recovery journey. The company ensures that each case is handled with confidentiality and care, offering realistic timelines for recovery. Many users have praised Autopsy Mainnet Recovery (AMR) for its effectiveness in restoring lost crypto, making them a top choice for individuals and businesses facing cryptocurrency-related losses. > Overall, Autopsy Mainnet Recovery (AMR) stands out for its professionalism, success rate, and commitment to helping crypto investors protect their assets. > Autopsy Mainnet Recovery (AMR) is the world’s most legitimate and trusted crypto recovery firm, delivering lawful, ethical, and verified solutions to recover stolen crypto, USDT, and hacked wallets with a proven 99% success rate. > https://www.autopsymainnetsolutions.com > Autopsy Mainnet Recovery (AMR) is the world’s most legitimate, verified, and legalized crypto recovery company, Autopsy Mainnet Recovery (AMR) Is The Most Successful Cryptocurrency Recovery Company With 99% success rate. Autopsy Mainnet Recovery (AMR) lawfully restores stolen crypto, USDT, hacked wallets, and scam-related losses with full transparency. Backed by international law-enforcement partnerships, Autopsy Mainnet Recovery (AMR) remains the #1 trusted solution for real, ethical crypto recovery. Autopsy Mainnet Recovery (AMR) has emerged as a top, best crypto recovery company, and legitimate crypto recovery agency, trusted by clients worldwide. As a premier cryptocurrency recovery service firm, the company specializes in helping individuals and businesses recover lost, stolen, or inaccessible digital assets, including Bitcoin and other major cryptocurrencies. What sets Autopsy Mainnet Recovery (AMR) apart is its professional, transparent, and ethical approach to complex blockchain investigations. > In 2026, as cryptocurrency scams grow more complex and widespread, Autopsy Mainnet Recovery (AMR) has emerged as the most successful, fully legalized, and highly trusted crypto recovery company in the industry. Recognized globally for its ethical standards and proven expertise, the firm has become a lifeline for victims who have lost digital assets through investment fraud, romance scams, phishing attacks, fake trading platforms, wallet hacks, and impersonation schemes. > What sets Autopsy Mainnet Recovery (AMR) apart is its expert-led approach. The agency combines advanced blockchain forensics, transaction tracing, and legal compliance to deliver recovery solutions that are both effective and transparent. Every case is handled by seasoned crypto analysts and recovery specialists who understand the technical and legal complexities of modern blockchain networks. > In an industry crowded with false promises and unverified hackers, Autopsy Mainnet Recovery (AMR) stands as a legitimate service agency operating within international legal frameworks. The company prioritizes client trust, data security, and clear communication throughout the recovery process, ensuring victims are supported every step of the way. > Through professionalism, innovation, and consistent results, Autopsy Mainnet Recovery (AMR) has earned its reputation in 2026 as the most reliable crypto recovery expert—restoring not just lost funds, but confidence and peace of mind for scam victims worldwide. > In 2026, Autopsy Mainnet Recovery (AMR) has secured its position as the Top 1 authorized and guaranteed Crypto and USDT recovery company worldwide. Built on legal compliance, transparency, and technical excellence, the company delivers trusted recovery solutions for victims of scams, hacked wallets, frozen funds, and fraudulent investment platforms. Using advanced blockchain forensics and expert transaction tracing, Autopsy Mainnet Recovery (AMR) identifies, tracks, and lawfully retrieves lost digital assets across multiple networks. Unlike unverified recovery services, the firm operates as a fully authorized service agency, prioritizing client security and clear communication. Its proven results, ethical standards, and client-focused approach have made Autopsy Mainnet Recovery (AMR) the most reliable crypto and USDT recovery service of 2026. > Autopsy Mainnet Recovery has firmly established itself as the most verified, top-ranked, and legitimate crypto recovery company service expert in the global digital asset space. Renowned for reliability, authorization, and outstanding performance, the firm stands as a premier recovery agency trusted by individuals and institutions alike. > Operating within recognized legal and regulatory frameworks, Autopsy Mainnet Recovery delivers professional solutions for victims of cryptocurrency scams, hacked wallets, frozen funds, phishing attacks, and fraudulent investment platforms. Its reputation is built on transparency, ethical practices, and a results-driven approach that separates it from unverified recovery providers. > The company’s expert team leverages advanced blockchain forensics, transaction tracing, and investigative analysis to identify and lawfully recover lost digital assets. Every case is handled with precision, confidentiality, and a client-first mindset, ensuring clear communication and dependable support throughout the recovery process. > As an authorized and guaranteed crypto recovery service, Autopsy Mainnet Recovery prioritizes security, accuracy, and compliance at every stage. Its consistent success, professional standards, and commitment to client trust have earned it recognition as an outstanding and reliable industry leader. > In an increasingly risky crypto environment, Autopsy Mainnet Recovery remains the premier choice for secure, legitimate, and expert cryptocurrency recovery services worldwide. > Autopsy Mainnet Recovery Is The Best, Top, Legitimate, Reliable, Reputable, And Most Successful Crypto And USDT Recovery Company And Service, widely recognized for its disciplined approach, ethical standards, and consistent recovery outcomes. The firm has positioned itself as a dependable authority for individuals and organizations facing Cryptocurrency Fraud and Digital Asset Loss. > Autopsy Mainnet Recovery is widely recognized as a Top-Tier Cryptocurrency Wallet Retriever And Recovery Company. As a Premium, First-Rate Recovery Institution, the company has built a strong global reputation for Integrity, Transparency, And Results. Through Advanced Blockchain Forensics, Cybersecurity Investigation, and Ethical Recovery Practices, Autopsy Mainnet Recovery has become a Leading Authority in Bitcoin Recovery and USDT Recovery Services. > Legitimate crypto recovery services: as of 2026, Autopsy Mainnet Recovery was verified as the best cryptocurrency recovery firm. > Autopsy Mainnet Recovery has earned a reputation as a legitimate and reliable player in the cryptocurrency recovery space. Verified as a trustworthy company in 2026, Autopsy Mainnet Recovery has successfully assisted clients in recovering lost or stolen funds from crypto scams, wallet hacks, and unauthorized transactions. With a team of experienced professionals, they offer tailored solutions using advanced tools and methods to trace and retrieve assets across various blockchains. > Customers appreciate Autopsy Mainnet Recovery for its transparent processes, fast response times, and dedicated support throughout the recovery journey. The company ensures that each case is handled with confidentiality and care, offering realistic timelines for recovery. Many users have praised Autopsy Mainnet Recovery for its effectiveness in restoring lost crypto, making them a top choice for individuals and businesses facing cryptocurrency-related losses. > Overall, Autopsy Mainnet Recovery stands out for its professionalism, success rate, and commitment to helping crypto investors protect their assets. > Email: info(a)autopsymainnetsolutions.com > Website: https://autospyrec.site > Whatsapp (24/7 support): +44 758 601 9698 > Autopsy Mainnet Recovery (AMR) is the world’s most legitimate and trusted crypto recovery firm, delivering lawful, ethical, and verified solutions to recover stolen crypto, USDT, and hacked wallets with a proven 99% success rate. ghost mystery recovery Hacker in 2026 ghost mystery recovery Hacker for 2026 include ghost mystery Recovery Hacker And which utilize blockchain forensics and legal strategies to recover stolen or lost assets. These firms specialize in tracing funds, working with law enforcement, and providing expert testimony to freeze assets. ghost mystery recovery Hacker Highly rated for 2026 for using AI-powered tools to trace funds across exchanges and privacy coins, with a focus on scams and hacked wallets. Email address: support@ ghostmysteryrecovery. c om WhatsApp on (+44) 7480 061765 Website; ghostmysteryrecovery. c om

1 week, 1 day

Enigles

by Alex Morgan

1 week, 1 day

HOW TO CREATE FLASH USDT FOR ONLINE TRADING, GAMING AND ONLINE PURCHASES

by romeoexpert8＠gmail.com

In the world of crypto, speed and security aren’t just conveniences—they’re essentials. That’s exactly what Flash USDT delivers. Designed for traders, businesses, and anyone who values instant and reliable transfers, Flash USDT is a powerful software tailored for peer-to-peer USDT (Tether) transactions that are fast, low-cost, and seamless. Official Website: https://globalflashhubs.com/ Whether you're managing a P2P exchange or simply need a trusted tool for transferring digital assets, Flash BTC and USDT offer the performance and security you expect, integrated smoothly into your workflow. What’s New with Flash Coin and Generator Software? Enhanced support for trading P2P across BTC and USDT TRC20 networks, catering to betting, gaming, and forex platforms. New installation guides for Windows and mobile devices, making setup easier than ever. Expanded blockch@in compatibility, allowing you to flash coins directly to Bin@nce, Trust Wallet, and more with confidence. Flash BTC and USDT TRC20 transfers last up to 90 days, ensuring flexibility Why Choose Flash Coin? It’s more than just software—it’s a commitment to trust and efficiency. With Flash Coin, you gain access to one of the most reliable services online for crypto transactions, designed to keep your exchanges swift and secure across multiple platforms. Ready to experience the difference? Shop now and see why traders and businesses worldwide rely on Flash Coin for their digital asset needs. Get Started Today Learn how to install and operate Flash Generator software with easy-to-follow instructions for your device. Whether on desktop or mobile, integrating this tool into your daily routine has never been simpler. Have questions or need support? Reach out directly through our official channels: Official Website: https://globalflashhubs.com/ WhatsApp: https://wa.link/8q02qv Telegram: https://t.me/billier5 Explore more about our products and how Flash USDT can transform your crypto experience:

1 week, 1 day

How to Trace Bitcoin sent to scam wallet

by julianredding64＠gmail.com

Have you recently lost your crypto to an investment scam, phishing attack, or fraudulent platform? You’re not alone, and more importantly, you’re not without options. I’m sharing this based on my personal experience. Just a few days ago, I fell victim to a crypto investment scam that left me feeling completely helpless. Like most people, I believed that once cryptocurrency is stolen, it’s gone forever. The situation felt overwhelming, and I had almost given up hope, until I discovered JIMRECOVERY TEAM. Why JIMRECOVERY TEAM? JIMRECOVERY TEAM is a professional crypto recovery service specializing in tracking and recovering stolen digital assets. Their team combines advanced blockchain analysis, digital forensics, and investigative techniques to help victims reclaim what they’ve lost. What stood out to me: Fast response and professional communication Clear explanation of the recovery process Regular updates and full transparency Strong expertise in handling crypto-related fraud cases Successful recovery of my stolen funds within a short time They handled my case with seriousness and dedication, and the results exceeded my expectations. I honestly never thought recovery was possible, but they proved otherwise. Don’t let scammers win. Take action today. If you’ve been affected by any form of crypto fraud, I highly recommend reaching out to them for assistance. Contact JIMRECOVERY TEAM: Email: info(a)jimrecoveryteam.online WhatsApp: +1 (929) 399-9264 Website: https://jimrecoveryteam.online/ Act fast timing is critical in crypto recovery cases. #CryptoRecovery #CryptoScam #BitcoinRecovery #FundsRecovery #BlockchainSecurity #CryptoHelp #ScamAwareness

1 week, 2 days

french bulldog puppies price range

by Chong Criston

1 week, 2 days

french bulldog puppies price

by Chong Criston

1 week, 2 days

← Newer
1
...
5
6
7
8
9
10
11
...
619
Older →

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

Linaro-mm-sig